Test Running - Heat Controller DMH18DB-1 Service Manual

Test Running

Test Running
1. Check that all tubing and wiring have been properly connected.
2. Check that the gas and liquid side service valves are fully open.
Prepare remote control
Remove the battery cover by pulling it according to the
arrow direction.
Insert new batteries making sure that the (+) and (–) of
battery are installed correctly.
Reattach the cover by pushing it back into position.
:
NOTICE
• Use 2 AAA(1.5volt) batteries. Do not use rechargeable
batteries.
• Remove the batteries from the remote control if the sys-
tem is not going to be used for a long time.
Evaluation of the performance
Operate all indoor units for 15~20 minutes, then check
the system refrigerant charge:
1.Measure the pressure of one of the gas side service
valves.
2. Measure the temperature of the intake and discharge
of air.
3. Ensure the difference between the intake temperature
and the discharge is more than 8°C(14.4°F).
4. For reference, the gas side pressure of optimum condi-
tion is as below.(Cooling)
Outside ambient
Refrigerant
TEMP.
R-410A 35°C (95°F) 8.5~9.5kg/cm
: If the actual pressure are higher than shown, the
NOTICE
system is most likely over-charged, and charge should be
removed. If the actual pressure are lower than shown, the sys-
tem is most likely undercharged, and charge should be added.
Important:
❏ Individual zones should be all in the same
operation mode (Heating or Cooling mode)
34 Multi type Air Conditioner
The pressure of the gas side
service valve.
2 G(120~135 P.S.I.G.)
Bolt
Discharge air
Tubing connection
Intake temperature
Discharge
temperature