NetCol5000-A035 In-row Air Cooled Smart Cooling Product Quick Guide

NetCol5000-A035 In-row Air Cooled
Smart Cooling Product
Quick Guide
Issue: 09
Date: 2025-01-23

1 Overview
Indoor Unit NetCol5000-A 35 kW
Power 380–480 V AC 3 Ph 50/60 Hz
Airflow 6800 m3/h
Pipe routing Overhead or underfloor piping
Standard Dimensions (H x W x D) 2000 mm x 600 mm x 1100 mm
Net weight 350 kg
Optional components Electric heater, humidifier, condensate pump

(1) Manual water (2) Electric control
drain button box
(3) Sight glass (4) Compressor
(5) Dryer filter (6) Refrigerant liquid
pipe
(7) Self-drainpipe (8) Refrigerant gas
pipe
(9) Condensate pump (10) Condensate
drainpipe pump
(11) Oil glass (12) Thermostatic
expansion valve
(13) Humidifier (14) Evaporator
(15) Fan (16) Electric heater
(17) Compressor drive


Outdoor Unit NetCol500-A036 NetCol500-A072
Power 380–480 V AC 3 Ph 50/60 Hz 380–480 V AC 3 Ph 50/60 Hz
Airflow 12000 m3/h 26000 m3/h
Net weight NetCol500-A0365C: 130 kg 185 kg
NetCol500-A0365S: 147 kg
Dimensions D = 1094 mm, W1 = 1370 mm, W2 = 1220 D = 1094 mm, W1 = 2200 mm,
mm, H1 = 1160 mm, H2 = 714 mm W2 = 2050 mm, H1 = 1100
mm, H2 = 654 mm
Optional components Low temperature component Sunshade

1 Copyright © Huawei Technologies Co., Ltd. 2025. All rights reserved.
NetCol500-A036 NetCol500-A072
2 Preparing Materials
Materials Cable ties, OT terminals, cord end terminals, voltage jumpers, water sensor and
Configured their components, teamwork cable, hose clamps, pipe accessories, expansion bolts,
with the and a humidity and temperature (T/H) sensor.
Equipment
Pipe components (including copper pipes, thermal
Refrigerant
insulation foam, oil traps, and inverted traps) and
pipeline
pipe supports.
Thermal insulation foam and hard pipe conversion
adapters (BSPT 1/2 in., connecting to external
Mandatory
threads) + hard pipes (using PP-R or C-PVC
item Waterway
materials) or pagoda connectors + hoses (inner
Engineering
diameter: 3/4 in., using EPDM materials), thermal
Procurement
insulation foam on waterway.
Power cables and on/off signal cables for the indoor
Cable
and outdoor units.
Humidity and temperature sensors and cables
Optional Cable and outside the cabinet, indoor unit racks (determined
item base by actual scenarios), and outdoor unit racks or
concrete bases (determined by actual scenarios).
• Vacuum pump: 7.2-14.4 m³/h, absolute vacuum ≤ 60 Pa (recommended).
• Pressure gauge (measure range is greater than 4.0 MPa), leather hose
(tolerance range is greater than 4.5 MPa), dedicated for R410A.
Special
• Welding torch and welding rod: silver copper welding rod (containing 5%
Tools and
silver).
Materials
• Nitrogen reducing valve: A reducing valve is recommended to install to the
outlet of the nitrogen steel vessel, and the reducing valve range ≥ 4.0 MPa.
• Dry nitrogen.


2
2.1 Refrigerant R410A


Do not use inferior refrigerant. Otherwise, Huawei has no responsibility for the damage caused
by the inferior refrigerant.
You are suggested to use R410A from the brand of Dupont, Daikin, Honeywell, or the same
quality refrigerant, and follow these suggestions to choose a high-quality refrigerant:
1. Dial the hotline of the refrigerant producer to confirm its reliability.
2. Put the refrigerant indoor for 24 hours. Then use a thermometer to measure the external
surface temperature of the refrigerant cylinder (figure 1), and connect a pressure gauge to
the cylinder to measure its internal pressure (figure 2). Look up the following table for the
saturation pressure that corresponds to the external surface temperature, and calculate the
deviation from the internal pressure. If the deviation is more than 0.2 MPa, the refrigerant
is not in good condition. Replace it.


Mapping between saturation temperatures and pressure of R410A
Saturation Gauge Saturation Gauge Saturation Gauge
Temperature (MPa) Temperature (ºC) (MPa) Temperature (ºC) (MPa)
(ºC)
10 0.99 16 1.19 22 1.43
11 1.02 17 1.23 23 1.47
12 1.05 18 1.27 24 1.51
13 1.09 19 1.31 25 1.56
14 1.12 20 1.35 26 1.60
15 1.16 21 1.39 27 1.65
28 1.69 31 1.84 34 1.99
29 1.74 32 1.89 35 2.05


3
2.2 Cable

(1) Indoor unit power cable (2) Outdoor unit power cable


2
4x6 mm2 5x2.5 mm

Total cable diameter: Total cable diameter:
Power to the
outdoor unit
16.8–18.0 mm Power to the
the indoor unit 13.0–15.0 mm
Mains power to
Mains power to
equipment room
equipment room


If you use a five-core power cable for indoor unit, do not install the neutral wire. Instead, cut off
it and properly wrap PVC insulation tape around the cutting place.

(3) On/Off signal cables for the indoor and outdoor units (polarity insensitive)

Indoor unit 2 Outdoor unit
terminal X2.5 2x1 mm terminal 1
Indoor unit Total cable diameter: Outdoor unit
terminal X2.6 6.4–8.4 mm terminal 2

2.3 Copper Pipe
(1) Liquid pipe: R410A copper pipe, 5/8 in. outer diameter, 1.0 mm
wall thickness, operating pressure ≥ 4.5 MPa.
(2) Gas pipe: R410A copper pipe, 7/8 in. outer diameter, 1.2 mm Copper pipes should meet
wall thickness, operating pressure ≥ 4.5 MPa. the requirements of
(3) Thermal insulation foam: thickness ≥ 13 mm. EN12735-1.
2.4 Oil Trap and Inverted Trap

Oil trap Gas pipe inverted trap Liquid pipe inverted
trap

Unit: mm


2.5 Pipe Support

Height of the U-shaped pipe clamp (H) = Diameter of the pip
(including thermal insulation foam) – 5 mm.


Materials from which the pipe support and pipe clamp are
made should meet the requirements of outdoor
application.
4
3 Installing the Indoor Unit

1. Read the related user manual or instructions before installing the NetCol5000-A.
2. The unit in this document is a fully configured NetCol5000-A. If some components are not
configured, skip the corresponding steps.
3. You are recommended to use tools that are fully insulated when installing devices.
4. Only engineers from the manufacturer or engineers certified by the agent are allowed to
install, commission, and maintain smart cooling products. Otherwise, personal injuries and
device damage may be caused, which is beyond the smart cooling product warranty range.
3.1 Removing the Float Sheet Metal Removing the Three Sheet
3.2 Metals from the Compressor

M8 (3 PCS)
Evaporator 15 N•m

Remove


Tighten


Connect


Water
pan
Water tank Preserve the removed sheet metals. Reinstall
them if the equipment is to be relocated
(container scenario).
3.3 (Optional) Installing an Enclosure Frame


1. Open the front door. Remove the front door,
the power cable of the display screen,
ground cable, fixing plate, connection plates,
and hinges.
2. Move the enclosure frame to the front door,
and adjust the anchor bolts of the enclosure
frame to ensure that the enclosure frame
has the same height with the cabinet.
3. Secure the enclosure frame to the front
door using eight M5 screws, as shown in the
right figure.


5
4. Secure the top sealing plate of the 5. Install the hinges and connecting plates on the
enclosure frame to the enclosure frame corresponding positions on the enclosure
using four M5 tapping screws. frame.
6. Install the power cable for the display screen.
Connect the ground cable under the front door
to the enclosure.


After installing the enclosure frame, the
power cable for the display screen may be
not long enough to open the door
completely. Cut off the cable ties, which
fastening the power cable, to make sure the
front door can rotate smoothly.

3.4 (Optional) Installing an Top Frame

Bottom pipe routing


Top pipe routing Install two M5 tapping screws (step3) at the front of the top
frame to set up equipotential bonding between the cabinet
and the top frame.


6
3.5 Securing the Indoor Unit

Scenario 1: Non-rack Installation

This method applies to non-rack installation.

Adjusting the feet Adjusting the cabinet


Scenario 2: Rack Installation

1. Preparing a rack
This method applies to rack installation.
4-M12x80 assembly screw mounting hole

Unit: mm


Shock absorbing bar 4-M12x60
expansion screw
mounting hole


7
1. You are advised to use angle steel, square steel or channel steel. Width of 60 mm and
thickness of 4 mm to 5 mm are recommended.
2. When D (width of angle steel) is more than 60 mm, it is interfering with the cable routing
holes. Cut out the part on the angle steel to avoid interfering. If D is less than or equal to 60
mm, skip this step.
3. Install a shock absorbed bar (5 mm thick, made of EPDM rubber) on the bottom of the rack.
4. Control the welding process and avoid excessive error.
5. The rack is applicable to the scenario with enclosure frames. After enclosure frames are
installed, holes for the screws installed to secure the rack and unit do not change.

2. Fixing the rack 3. Securing the smart cooling product on the rack

M12x60 (4 PCS) M12x80 (4 PCS)
45 N•m 45 N•m


Secure the smart cooling product on the
rack using four screws removed from
the pallet.
4 Installing the Outdoor Unit


Protective cardboard for fins must be removed after installation to protect people from injuries.


8
Scenario 1: Horizontal Installation

1. Top View of the Installation Space

The distance from the low-temperature component to the outdoor unit can not exceed 2 m.


unit: mm


2. Concrete Base Dimensions (Unit: mm) 3. Dimensions of the Concrete Base and Securing
Low-temperature Component

M12x60 (4 PCS)
45 N•m


Model W1 W2 D1 D2 H

NetCol500-A072(036) ≥ 250 1877 (1047) ≥ 250 924 150–250

Low-temperature Component ≥ 600 210 ≥ 400 130 150–250


9
4. Procedure for Horizontal Installation

a. Remove the straight flanges.


b. Install the four legs.
M6x16 (24 PCS)
3 N•m c. Secure the legs on the concrete base.


Scenario 2: Vertical Installation

1. Top View of the Installation Space (Unit: mm)
2. Concrete Base Dimensions and Vertical
Model NetCol500-A072 (036) Installation (unit: mm)
W1 ≥ 250
D1 ≥ 500
H 150–250
W2 2090 (1263)


10
Scenario 3: Installing outdoor unit with a rack

Unit: mm


NetCol500-A036 NetCol500-A072

For the procedure for installing outdoor unit with a rack, see the outdoor unit user manual.
5 Welding Refrigerant Pipes
5.1 Indoor and Outdoor Connection Diagrams


1. When outdoor unit is installed horizontally, the outdoor unit and the low-temperature
component must be at the same height. When outdoor unit is installed vertically, the outdoor
unit must not be lower than the low-temperature component, and the height difference cannot
exceed 1.5 m.
2. When calculating the height difference, the compressor base is regarded as the baseline for the
indoor unit.
3. The inverted trap should be higher than the top copper pipe of the condenser.
4. In the figure, is a sign of a tilt, indicating that the scale of the pipe tilting is at least 1:200.
The pipe tilting direction should be consistent with the hypotenuse of the right triangle.
Bottom pipe routing
(1) Inverted traps
(2) Oil traps
(3) Tilted gas pipe
(4) Tilted liquid pipe


11
Top pipe routing

(1) Inverted traps
(2) Oil traps
(3) Tilted gas pipe
(4) Tilted liquid pipe


1. When welding pipes, ensure that the pipes are dry. You are recommended to weld the pipes
between the indoor and outdoor units, then connect the two ends of the pipe to the indoor unit
and outdoor unit.
2. After the pipe in the middle is welded, charge nitrogen into the pipe from one pipe end to clear
the foreign matter inside.
3. Do not expose welding positions to the environment for a long time. Take sealing measures for
welding positions. If foreign matter exists at the welding position, rubber it out using non-water
alcohol or damp cloth before the welding.
Wall


Pipe
Pipe Unit: mm
support


• Exhausting nitrogen from the
5.2 Exhausting Nitrogen three valves respectively. Do not
remove the valve plug in case of
loss.
Low-
• The NetCol500-A072 has no
pressure Discharge protective sheet metals.
needle pipe
valve needle
valve

Liquid pipe
needle valve


12
5.3 Welding the Indoor Unit
Top pipe routing Bottom pipe routing


Thermal
insulation
foam


Thermal
insulation Liquid
foam Gas pipe pipe


Liquid pipe
Gas pipe

5.4 Welding the Outdoor Unit (Optional) Connecting Low
5.5 Temperature Component Pipes
(Applied to NetCol500-A036)
• When the outdoor is installed vertically,
gas pipe should be connected to the top
To outdoor unit liquid pipe
port and liquid pipe should be
To indoor unit liquid pipe
connected to the bottom port. To outdoor unit gas pipe
• The NetCol500-A072 has no protective
sheet metals.


To indoor unit
gas pipe

To outdoor unit gas
Thermal pipe
insulation
foam


To outdoor
unit liquid
pipe
Liquid pipe

Gas pipe

To indoor unit liquid pipe To indoor unit
gas pipe
13
5.6 (Optional) Installing the Sunshade (Applied to NetCol500-A072)


6 Connecting Water Pipes

Configuration Pipes to Be Connected Remarks
Humidifier water inlet pipe,
Condensate pump, heater,
condensate pump drainpipe, 1. Optional: If there are raised floors
and humidifier
and self-drainpipe (optional) or racks, connect the self-drainpipe.
Otherwise, you are not required to
Condensate pump. No Condensate pump drainpipe connect the self-drainpipe.
heater or humidifier and self-drainpipe (optional) 2. The pump lift is 3.5 m.
3. Condensate pump drainpipe and
Heater and humidifier. No Humidifier water inlet pipe
self-drainpipe should not be
condensate pump and self-drainpipe
connected together to avoid water
No condensate pump, in the self-drainpipe flowing back
Self-drainpipe
heater or humidifier to the pump.

Connecting method
pump
pump
drainpipe
drainpipe
-
-
drainpipe
drainpipe
Self
Self
Condensate
Main Main Condensate
waterway waterway


(1) Conversion adapter (2) Hard pipe (3) Pagoda connector
(4) Hose clamp (5) Hose (6) Conversion adapter (7) Hard pipe

14
6.1 Connecting Humidifier Water Inlet Pipe and Condensate Pump Drainpipe
Either method 1 and method 2 can be adopted.

Top pipe routing 1. When routing pipes from the top, do
Humidifier not route the pipe over servers. If
water inlet pipe unavoidable, take preventive measures
Condensate to protect servers from water.
pump drainpipe 2. Wrap each part of the pipe with
thermal insulation foam.
3. Use supports to secure pipes.
6.2 Connecting the Self-drainpipe
Adopting method 3


Humidifier
water inlet
pipe
Condensate
pump drainpipe

Bottom pipe routing

7 Connecting Cables
7.1 Connecting Indoor Unit Power Cable, Water Sensor, and Installing
Voltage Jumper


The value on the voltage jumper label
should match the mains voltage.


15
7.2 Connecting the Outdoor Unit On/Off Signal Cable and Power Cable


(1) Hole for routing
Terminal 2
cables to the T/H
Terminal 1 sensor
(2) Hole for routing
signal cables
Outdoor unit (3) Hole for routing
on/off signal cable
power cables and
Water sensor ground cable


Outdoor unit Indoor unit
power supply power supply Ground bar in the
equipment room


1. For different outdoor units, the electric distribution is different, but the silkscreen is the same.
2. This figure shows how to route cables from the bottom. Cables can be routed from holes 1, 2, and 3
when routing cables from the top.
3. Cables for the outdoor unit should be protected from water and sun exposure. Tubes are recommended
for the protection.
4. The outdoor unit cannot receive power from the indoor unit.
5. The outdoor unit on/off signal cable must connect to terminals 1 and 2. Do not connect the cable to
other terminals, otherwise, the outdoor unit control board would be burnt.
7.3 (Optional) Connecting Cables of the Low-temperature Component
and the Heater (Applied to NetCol500-A036)
1. Connecting the cable of the low- 2. Connecting the cable of the heater
temperature component M4 (8 PCS)
3 N•m


Heating cable

1. After crimping the power cable of the low-temperature component to terminals, fit it with the
corrugated pipe in the fittings bag, and then connect it to the electric control box of the
outdoor unit.
2. It is recommended that cables be deployed in cable troughs.
16
7.4 (Optional) Connecting Teamwork Network Cables and Hose Cables

Method 1 (recommended)
1. If teamwork control is
unavailable, you do not need to
connect teamwork network
cables.
2. If teamwork control is available,
connect devices in series
according to the figure.
3. If teamwork control and host
monitoring are available,
connect the host to the first or
last teamwork smart cooling
product using a network cable.

Method 2 (applicable to the mart ETH gateway
scenario)


When the host monitors smart cooling products using the RS485 protocol, the time needed for
collecting all data from a single smart cooling product is 3 seconds. In the teamwork mode of
cascading using an RS485 bus for monitoring, it takes the host 3 seconds multiplied by N to
collect data from N smart cooling products in the group. For example, the time needed for
collecting data from four smart cooling products is 12 seconds. If the total monitoring time is
too long, use the solution shown in the following figure to connect single smart cooling
products to independent communication ports on the host. Choose the host monitoring mode
based on the host parameters.


17
7.5 (Optional) Connecting Monitoring Cable from FE Port


7.6 Connecting the T/H Sensor Outside the Cabinet

Addr DIP Switch ID
Name
ess 1 2 3 4 5 6
T/H 1 at the
return air 1 ON OFF OFF OFF OFF OFF
vent
T/H 1 at the
11 ON ON OFF ON OFF OFF
cold aisle
T/H 2 at the
12 OFF OFF ON ON OFF OFF
cold aisle
T/H 3 at the
13 ON OFF ON ON OFF OFF
cold aisle
T/H 1 at the
21 ON OFF ON OFF ON OFF
hot aisle
T/H 2 at the
22 OFF ON ON OFF ON OFF
hot aisle
T/H 3 at the
23 ON ON ON OFF ON OFF
hot aisle

The T/H sensor should be 1.5 m away from the ground. You can secure a sensor to the cabinet
using cable ties or two M4 screws together with a sheet metal. After the sensor is secured, set
the sensor address according to the following table.
8 Verifying the Installation
Item Check That Result
Ports are connected properly. The pipeline has oil loops, reverse U-
Refrigerant shaped traps, gradients (of the refrigerant pipes), and supports. Pipes are □Passed
pipe tightly secured. Needle valves are equipped with needle plugs and pipes □Failed
are wrapped with thermal insulation foam, without bends.
The water inlet pipes, drainpipes, and self-drainpipe are securely □Passed
Waterway
connected. □Failed
Cables are not damaged. Power cables for the indoor and outdoor units
and voltage jumper, signal cables for the indoor and outdoor unit, water
Cable sensor, and humidity and temperature sensor, and teamwork cables are □Passed
connection properly connected. Cable terminals securely crimp cables, without □Failed
crimping the cable shell. Indoor and outdoor units are properly
grounded.
18
Item Check That Result
The cabinet is securely fixed on the rack at the bottom. Foreign matter □Passed
Cabinet
inside the cabinet such as cable ties and sundries has been cleaned up. □Failed
The compressor sheet metals are removed and the bolts are secured.
□Passed
Compressor Coils for the return oil solenoid valve and liquid solenoid valve are
□Failed
securely fixed.
Sheet metals for fixing the float are removed, the float is properly □Passed
Float
secured, wiring terminals are connected, and the float flexibly responds. □Failed
The humidifier water supply pipe and drainpipe are properly connected □Passed
Humidifier
and secured, and do not leak. □Failed
□Passed
Fan The fan is secured, without foreign matter inside.
□Failed
Differential Cable ties for the differential pressure tube are securely tightened, and
□Passed
pressure the differential pressure tube is free from foreign matter, blocks, and
□Failed
switch obvious bends.
The fan blades do not interfere and protective cardboard for fins are
removed. Bonnets of needle valves and water-proof connectors are
Outdoor tightened. Cables are protected by tubes and the cable outlet faces □Passed
unit downward. Glue is applied to the waterproof connector when the □Failed
outdoor unit is placed vertically and the waterproof connector faces
upward.
9 Calculating the Amount of Refrigerant and Extra Refrigerant Oil
Straight Pipe Equivalent Length
Copper pipe outer diameter 90-degree bend 180-degree bend
5/8 in. 0.3 m 0.6 m
7/8 in. 0.42 m 0.8 m


One-way pipe length = Straight pipe equivalent length + Length of straight pipes between
indoor and outdoor units. The one-way pipe length should be 60 m at most. If the actual length
exceeds 60 m, contact Huawei technical support.

9.1 Refrigerant Charge of NetCol5000-A035

One-Way NetCol500-
NetCol500-A072 without
Pipe NetCol500 036 & low-
Refrigerant copper tube protection sheet
Length -A036 temperature
Charge metal
(L) Component
Standard charge
≤ 10 m 14 35 16
(kg)
Refrigerant charge
=Standard charge = 14 + 0.14 = 35 + 0.14 x
> 10 m = 16 + 0.14 x (L - 10)
+ additional charge x (L - 10) (L - 10)
(kg)


19
9.2 Extra Refrigerant Oil Charge

The refrigerant oil, Danfoss 160SZ, is recommended.
• If the low-temperature component is not connected, do not add refrigerant oil.
• If the low-temperature component is connected, and L ≤ 10 m, do not add refrigerant oil.
• If the low-temperature component is connected, and L > 10 m, additional refrigerant oil =
additional refrigerant charge x 4%.

10 Leak Checking, Vacuuming, and Precharging Refrigerant
10.1 Leak Checking
Charge 3.5 MPa nitrogen and preserve the system for 24 hours. Provided that the ambient
temperatures before and after the preservation are similar, the system pressure should not drop.
If leaks occur after the preservation, check them along the pipe, especially at the welding
positions, needle valve, and angle valve.

10.2 Charging in Refrigerant Oil (Optional) and Vacuuming

If the low-temperature component is connected and L > 10 m, refrigerant oil is required to add.
The vacuuming time should be 80 minutes at least and the final pressure (absolute pressure)
should be 160 Pa at most. When the pressure stops dropping, pump for another 10 minutes. After
the vacuumization, close all the vacuum pump and valves. Preserve the system for another 10
minutes and the pressure (absolute pressure) should be 260 Pa at most. If the pressure gauge
cannot be precise at 160 Pa, ensure that the pressure is displayed at the minimum scale. Extend
the preservation time to one hour. Then check whether the pressure displayed on the pressure
gauge increases.
10.3 Precharging Refrigerant

1. Take off the vacuum pump from the vacuuming equipment, and replace the vacuum pump with
a refrigerant steel vessel.
2. Partially open the refrigerant steel vessel valve and rubber tube nut. Tighten the nut when you
feel cold air coming out from the nut.
3. Put the refrigerant steel vessel upside down on an electric balance. Clear the reading on the
balance.


If the R410A refrigerant is provided by Huawei, put the refrigerant steel vessel upside down
when charging in the refrigerant. If the refrigerant is not provided by Huawei, check with the
refrigerant provider whether the steel vessel has a siphon. If the vessel has a siphon, put it
upside up when charging in refrigerant. If the vessel has no siphon, put it upside down when
charging in refrigerant. These measures ensure that the refrigerant is charged in the liquid form.

4. Open pressure gauge valves, and the refrigerant steel vessel valve to charge refrigerant.
5. Charge 10 kg liquid refrigerant (If low-temperature component is configured, charge 15 kg liquid
refrigerant). The rest refrigerant is to be charged during power-on and commissioning.
6. After refrigerant charging, close pressure gauge valves, and the refrigerant steel vessel valve.

20
Without configuring low-temperature component 1. Leak Checking
2. Vacuuming
3. Precharging Refrigerant


Configuring low-temperature component
1. Leak Checking


21
2. Charging in Refrigerant Oil


Pump gas from the
discharge pipe and liquid
pipe needle valves to
from a negative pressure
in the pipes to pump the
refrigerant oil in.

3. Vacuuming
4. Precharging Refrigerant


22
11 Power-On
11.1 Power-On

1. Subsequently switch on main control board power circuit breaker QF8 and general circuit
breaker QF1.
2. Measure the controller loop voltage by using a voltmeter. Ensure that the control voltage is
within the range of 24 V AC (tolerance ±10%).
11.2 Basic Settings

For initial power-on, the system enters the quick setting screen. Set the Language, Date format,
Date, Time, Zone, Monitor mode, and verifying the present voltage. For non-initial power-on,
the LCD automatically enters the home screen.

11.3 Temperature and Humidity Settings

NOTE
1. Users include Admin, Engineer, Operator, and Guest. The Admin users have the highest
permission, followed by the Engineer, Operator, and Guest users. The initial passwords for
the Admin, Engineer, and Operator users are all 000001. The Guest user does not have a
initial password. For system security purposes, change the preset password upon first login.
2. After login to the system using a user name, the user right is valid when you touch the screen
all the time. If you do not touch the screen, the user right is only valid for 3 minutes. To
ensure security, manually log out by tapping at the right corner of the home screen.

On the main screen, tap Settings > System Settings > T/H Sensor to change temperature and
humidity control types or set points.

NOTE
To set T/H control type, Temp control mode, cold aisle sensors 1, 2, and 3, and hot aisle
sensors 1, 2, and 3, log in as the Engineer user. To set other parameters, log in as the Operator
user.


23
11.4 (Optional) Operation Guide for Teamwork Connection
Using four smart cooling products in teamwork as an example:
NO. Items
Commu Teamw Teamw
CAN
nication ork ork CAN
netwo
s addres resistor
rking
address s enable
1 1 1 1 Yes
2 2 1 2 No
3 3 1 3 No
4 4 1 4 No
5 5 2 1 No
6 6 2 2 No
7 7 2 3 No
8 8 2 4 No
…… …… …… …… No
n-3 n-3 k 1 No
n-2 n-2 k 2 No
n-1 n-1 k 3 No
n n k 4 Yes

1. Communications address: The communications addresses of smart cooling products
controlled by one element management system (EMS) must be different. The
communications addresses are independent of cable routing sequences and teamwork
addresses. Under each EMS, a maximum of 255 smart cooling products can be connected.
2. CAN networking: In each CAN teamwork unit, a maximum of 32 smart cooling products can
be connected. In each EMS, a maximum of four teamwork networkings are supported. One
teamwork networking is recommended for the response speed of EMS.
3. Teamwork address: In each teamwork networking, teamwork addresses must be different
and the address of one smart cooling product must be 1 (indicating the host).
4. Teamwork CAN resistor enable: determined by cable connecting sequence. After connecting
the first and nth smart cooling products in series, set this parameter to Yes for the first and
nth smart cooling products in the network, and remain it in No for other smart cooling
products.


If the network management port has fewer than eight pins, select the cables to be crimped and
connected based on the preceding figure.
24
12 Commissioning


The crankcase heat tape starts to work when the general circuit breaker QF1 and main control
board power circuit breaker QF8 are on. Ensure that the crankcase heat tape has been
preheated for over 12 hours before starting the compressor. Otherwise, the compressor will be
damaged. Huawei will not be liable for any consequences.


When the total load of servers, relative to a single smart cooling product, is less than 10 kW,
high humidity may occur. For this situation, perform the following operations.
1. Make sure the whole data center room (such as doors, windows, floor, and ceiling) is sealed
well.
2. If the outside environment humidity is high, turn down the fresh air system.
3. Open the modular doors and ceilings, or open some false panels on the IT rack.
4. On the main screen, tap Settings > System Settings > System Control, and set Heat mode
to Dehumid&LT.
5. On the main screen, tap Settings > System Settings > T/H Sensor, and set T/H control type
to Return-air or Cold aisle.

1. Switch on fan circuit breakers QF6, electric heater circuit breaker QF4, humidifier circuit
breaker QF5, condensate pump circuit breaker QF9, and compressor circuit breaker QF3,
outdoor unit general circuit breaker.
2. Tap Start on the LCD, and then choose Maint > Diagnostic Mode > Enter to enter the
diagnostic mode.
3. Start the electric heater on the diagnostic mode page. Verify that the indoor fans rotate
smoothly, and the electric heater generates heat.
4. Close the electric heater on the diagnostic mode page. Adjust the compressor rotation speed
to 3000 rpm and adjust the humidifier input to 50%.
5. Adjust the compressor.
a. Choose Running > Device Details > Compressor on the indoor unit home screen. Check
whether the suction pressure and exhaust pressure are within the reasonable range.
(suction pressure: 0.7–1.2 MPa; exhaust pressure: 1.5–4.15 MPa)
b. Open valves and charge refrigerant from the low-pressure needle valve. Ensure that the
refrigerant is charged in small amount or charged discontinuously. The total charging
amount must meet the calculation requirements.
c. If possible, check that the subcooling degree is within the range of 4–6ºC, and check that
there are no bubbles in the refrigerant seen from the sight glass. Recharge or discharge
refrigerant if necessary.
d. After twenty minutes, check that the oil level is stably above 1/3 of the oil sight glass and
that no impurity or muddy.


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6. Adjust the humidifier and condensate pump.
a. After the humidifier is started, the water supply solenoid valve leads to a higher liquid
level in the humidifier. Make sure that water supply is smooth and the water pipe is free
from leakage. Water inside the humidifier is with bubbles or boils after 10 minutes.
b. Press the humidifier manual drainage switch on the electric control box side panel, and
ensure that the water drainage solenoid valve generates a bang. The water level in the
humidifier decreases. Water is drained smoothly, and the pipe is free from leakage.
c. Switch the plug screw to discharge air, until water flows out of the plug screw.


d. If the condensate pump does not react, you can recharge and drain to make the low
float floating for a period of time. After the condensate pump is started, check that the
pump drains properly and the pipe is free from leakage.
7. Ensure that the rotation direction of the outdoor fan is consistent with that shown on the
label, and the outdoor fan rotates smoothly. If the outdoor fan does not rotate, check that:
a. Whether the light of the phase sequence protector is on. If it is off, the phase sequence
may be incorrect or the indoor unit signal cables are improperly connected.
b. Signal cables for the indoor and outdoor units are properly connected.
8. Adjust the compressor and humidifier input into 0 rpm and 0%. Exit the diagnostic mode.
9. Record parameter values during the commissioning. For details, see the Power-On
Commissioning Report.

13 Checking After Commissioning

Check Item Result
The controller exits the diagnostic mode. □Passed □Failed
The temperature and humidity set points are properly set. □Passed □Failed
All circuit breakers are on. □Passed □Failed
The drainage button on the electrical control box is in the position of "O:
□Passed □Failed
normal humidifying".

14 Power-off
1. On the home page, tap Shutdown.
2. Switch off the general circuit breaker QF1.
3. If the smart cooling product needs to be maintained in power-off mode or long-term power-
off, switch off the smart cooling product circuit breaker on power distribution frame (PDF).

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15 Routine Maintenance
Component Monthly Maintenance Item Troubleshooting
Air filter The air filter surface is free of accumulated Replace the air filter. Huawei recommends replacing
dust, damage, and deformation. the air filter once every six months.
Compressor The compressor generates no abnormal Slightly shake the compressor and touch the four
noises, such as metal friction noise. anchor bolt to check whether they are loose. If they
are loose, tighten them using a 13# solid wrench. If
the problem persists, contact Huawei technical
support.
Run the indoor unit and check that the oil Add Refrigerant oil. For details, contact Huawei
level is stably above 1/3 of the oil sight technical support.
glass and that no dense white bubbles
cover the entire glass surface.
Humidifier The humidifier interior wall is free from Replace the humidifier. Huawei recommends
large quantity of water scale. replacing the humidifier once every six months.
Pipe The color of the sight glass is near green, If the sight glass completely turns yellow, water is too
or not completely turns yellow. much in the pipe. To solve the problem, empty
refrigerant out of the pipe, vacuumize the pipe, drain
out water, and then charge new refrigerant.
Touch the compressor angle valves, needle If there is an oil stain, check whether the suction
valves, and welding spots of the refrigerant pressure and exhaust pressure of the compressor is
pipe with your hands protected by a pair of within the normal ranges. (For the proper ranges of
protective gloves to check for oil stains. suction and exhaust pressure of the compressor. If the
pressure is beyond the normal range, contact Huawei
technical support.
No water exists under the water pipe or on If drops of water are evenly distributed, wipe off them
the thermal insulation foam. with a dry cloth.
If there are large water marks, close the water inlet
sluice and process the leak points. If the thermal
insulation foam is damaged or missing, lay out new
thermal insulation foam.
The thermal insulation foam is properly Replace the thermal insulation foam if it is damaged
laid out along the pipe. or missing.
Indoor fan The indoor fan guard is not deformed, and Replace the fan.
the fan blades are not damaged.
The indoor fan runs smoothly. Take out the foreign matter if the fan does not run
smoothly.
The screws on the indoor fan are not loose Tighten the screws using a 10# socket wrench.
or distorted.
Electric heater The electric heater surface is not eroded, Replace the electric heater.
dirtied, or blocked.
Humidity and Humidity and temperature sensors in Secure the sensors again.
temperature smart cooling products and aisles are
sensor securely installed.
Water sensor The water sensor is secure, and the two Replace the water sensor.
downward metal conductive plates do not
interfere with each other or corrode.

For quarterly and yearly maintenance, see the chapter of system operation and maintenance in
NetCol5000-A(025, 035) In-row Air Cooled Smart Cooling Product User Manual (600 mm Width).

Huawei Technologies Co., Ltd.
Huawei Industrial Base, Bantian, Longgang
Shenzhen 518129 People's Republic of China
www.huawei.com
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