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23
Heat Controller, Inc. VMH SerieS Installation Manual
Perform the electric safe check after
completing installation:
1. Insulated resistance
The insulated resistance must be more than
2M .
2. Grounding work
After finishing grounding work, measure the
grounding resistance by visual detection and
grounding resistance tester. Make sure the
grounding resistance is less than 4 .
3. Electrical leakage check (performing during
test running)
During test operation after finishing installation,
the serviceman can use the electroprobe and
multimeter to perform the electrical leakage
check. Turn off the unit immediately if leakage
happens. Check and find out the solution
ways till the unit operate properly.
A: Lo packed valve B: Hi packed valve
C and D are ends of indoor unit connection.
CAUTION
Electrical safety check
Gas leak check
1. Soap water method:
Apply a soap water or a liquid neutral
detergent on the indoor unit connection
or outdoor unit connections by a soft
brush to check for leakage of the
connecting points of th piping. If bubbles
come out, the pipes have leakage.
2.
Leak detector
Use the leak detector to check for leakage.
Safety and leakage check
15
Indoor unit
check point
Outdoor unit
check point
n
m
k
j
i
h
A
B
C
a
c
b
d
e
f
a,b,c,d,h,i,j , k are points for one-two type.
a,b,c,d,e,f,,h,i,j,k,m,n are points for one-three type.
Indoor unit
check point
Outdoor unit
check point
One-four type
30
AIR PURGING
Fig.63
Fig.64
NOTE: The illustration is for explanation
purpose only. The actual order of A, B, C
and D on the machine may be slightly
different from the unit you purchased. The
actual shape shall prevail.
Air Purging
NOTE: The illustration is for explanation
purposes only. The actual order of A, B, C
and D on the machine may be slightly
different from the unit you purchased. The
actual shape shall prevail.
Apply a soap water or a liquid neutral
detergent on the indoor unit connection
or outdoor unit connections with a soft
brush to check for leakage of the
connecting points of th piping. If bubbles
come out, the pipes have leakage.
test run).
Refrigerant Leak Check
Safety and Leak Check