Owner’s Manual
Quantum Energy Technologies
Document number: QDC0030PD-16.4 Page 30 of 36
A.
4: Shortage Of Hot Water
Probable Cause
Test / Observation
Action
1. System under sized.
Check actual load with design load.
Re-size.
2. Unexpected load or
weather condition.
a. Check for excessive hot water draw.
b. Check for not water leakage.
c. Check heat loss if the heater is on
reticulation circuit.
a.
Re-size if extra hot water
draw is to be included in the
design.
b.
Repair leakage if found.
c. Re-size with heat loss included
in the design or install
booster.
3. System not producing
enough heat.
Check according to Table A.3: item 2, 3 &
4.
See Table A.3: items 2, 3 & 4.
A.5: Testing Undercharge Or Overcharge Of Refrigerant
Unlike normal refrigerating or air conditioning systems, the QUANTUM heat pump operates under a very
wide range of evaporating and condensing temperatures. To identify undercharge or overcharge of
refrigerant gas in the system, three parameters need to be checked.
1. Current Draw
2. System Pressures
3. Bubbles through sight glass on the receiver / filter-dryer
A.6: Water Temperature, Condensing Pressure & Amperage – R134a Units
Water
Temperature
Approx. Discharge Gauge
Pressure
Nominal Current Draw (varies with evaporating
temperature)
In Tank
℃
kPa
PSI
800 Watt
Compressor
Code
RE165VHAMC
1100 Watt
Compressor
Code
RE231VHAMC
1700 Watt
Compressor
Code
PE39VPEMT
30
40
50
55
60
900-1050
1200-1350
1500-1600
1700-1850
1900-2100
130-150
175-195
218-232
247-270
305-305
2.3-2.6A
2.8-3.0A
3.4-3.7A
3.8-4.0A
4.1-4.4 A
3.2-3.5A
3.8-4.1A
4.7-5.0A
5.2-5.5A
5.6-6.0A
6.0-6.3A
6.7-7.0A
8.0-8.2A
8.6-9.0A
9.2-9.5A
A.7: Suction Pressure – R134a Units
Typical Suction Pressure (Back Pressure – Low Side)
Ambient
Temperature
℃
Evaporator
Temperature
℃
kPa
PSI
15
20
25
30
3
7
11
15
225
275
325
385
32.5
39.5
47
56
