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Design & installation Guide For McQuay MDS Multi System
1. Use the Confirmation table to add more secondary refrigerant
Calculate the additional amount of secondary refrigerant required according to the diameter and
length of the copper pipes.
The table below lists the formula used to calculate the additional amount of secondary refrigerant
needed for liquid copper pipes of various diameters (The amount of secondary refrigerant
required for the pipes that come with the indoor unit is already available).
Annex 6 Confirmation Form
3. Test and maintenance record
Below are the operating parameters that must be recorded during the test.
Recorded by: Date of recording:
Record of unit maintenance
Recorded by: Date of recording:
Suction Exhaust Voltage Current Transient heat of the Environment Remarks
pressure (bar) pressure (bar) (V)
A
entire equipment temperature
1
st
time
2
st
time
3
st
time
4
st
time
5
st
time
6
st
time
Suction Exhaust Voltage
V
Current(A) Transient heat of the Environment
pressure (bar)
pressure (bar) entire equipment temperature
Power off protection- current Outdoor unit A Indoor unit A
Power cable model Outdoor unit mm
2
Indoor unit mm
2
If the addresses of the indoor unit are properly set
If the indoor unit is powered
If the communication line is properly connected
If the manifolds are mounted as required
If the condensate water pipe of the indoor unit is clear
If the equipment is properly grounded
If the equipment is properly insulated( 10M
If the input voltage is correct (220V 10% or 380V 10%)
Check that the piping is airtight and vacuum before they are refilled
If the number of indoor units is preset using the outdoor unit controller
If the valve of the outdoor unit is opened
2. What to be confirmed before the trial run
Diameter of Additional amount of Length of Required amount of
copper pipe secondary refrigerant (g/m) piping (m) secondary refrigerant (kg)
6.35
9.52
12.7
15.88
19.05
22.23
Total
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