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SINCLAIR
indoor):
(1) Calculate the refrigerant perfusion quantity of the water heater.
Total perfusion quantity of the system (kg) = Perfusion quantity of outdoor unit before delivery (kg) +
Perfusion quantity added onsite (kg)
(2) Calculate the minimum volume of space for installing the water tank (m³).
Volume of space for installing the water tank (m³) = Length x Width x Height
NOTE: The length, width, and height is the valid length of the indoor space.
(3) Calculate the maximum concentration of the refrigerant system.
Total refrigerant quantity of the system ≤ Maximum allowable concentration (kg/m³) x Volume of
space for installing the water tank
NOTE: If there is no local standard on the maximum allowable refrigerant concentration, the
maximum allowable concentration is 0.3kg /m³.
(4) If the concentration exceeds the maximum allowable value, the refrigerant system must be
re-designed into multiple small-volume refrigerant system or consult the local sales company of
Sinclair.
If the water tank is installed outdoor, the refrigerant concentration in the case of refrigerant leakage
will not exceed the allowable value. However, if a large amount of refrigerant leaks within a short
duration, keep away from the leakage source and unplug the unit. In addition, contact the local sales
company of Sinclair to handle this case onsite.
8.2 Method for Calculating Incremental Refrigerant for Extended Pipe
Length of the pipe configured for the water heater for standard configuration is 3 m. If the pipe meets
the installation requirement, there is no need to add refrigerant. If the pipe needs to be extended, add
refrigerant according to the following table:
Extended Pipe Length
≤ 10 m
10 m-20 m
8.3 Refrigerant Replenishing Method
Refrigerants can be replenished for the source water heater only in specific MODE.
First, connect the hose in the middle of the pressure gauge to the refrigerant bottle, and connect
(but do not tighten) one end of the blue hose of the low pressure gauge to the fluoride injection mouth of
the air valve on the unit. Then, open the valve of the refrigerant bottle. Open the valve next to the low
pressure gauge for 5 seconds and close it, and immediately tighten the hose interface on the fluoride
injection mouth.
In "HOT WATER" MODE, press and hold "MODE"+"" for 5 seconds to enter the query status.
When the temperature display area displays "00", press and hold "MODE"+"" for 5 seconds. Then, "00"
changes to "P0". Pressing the "" or "" button to switch to "P3". Then, press the "MODE" button for
settings. Pressing the "" or "" button again to change "00" in the time display area to "01". Press
"MODE" to confirm and complete the settings. After the settings are complete, when the low pressure
gauge pointer declines, you can loosen the valve next to the low pressure gauge for refrigerant
AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
Quantity of Incremental Refrigerant
R134a system
R410A system
42
/
+20 g/m (20 g per 1 m extended)
+22 g/m (22g per 1 m extended)
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