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12 | Section
2. Installation
TESTING GAS LEAKS
THE MASTERTEMP HEATER IS INTENDED FOR INSTALLATION WITH A METERED GAS PRESSURE REGULATOR.
Before operating the heater, the heater and its gas connections must be leak tested. Do NOT use an open flame to test
for leaks. Test all gas connections for leaks with soapy water.
The gas valve must be completely disconnected from the gas supply piping system during any pressure testing of that
system at test pressures in excess of 6.0 kPa (60 mbar).
TESTING THE GAS PRESSURE THROUGH THE COMBINATION GAS CONTROL VALVE
Risk of fire and explosion. Alteration, service, or maintenance of the Combination Gas Control Valve can lead to fire or
explosion, causing loss of life, personal injury, and/or property damage. DO NOT ATTEMPT TO ADJUST THE GAS CONTROL
VALVE.
These instructions are for the use of qualified service technicians only!
1. Shut off the gas supply to the heater.
2. Loosen the small screw inside the pressure tap as shown in
3. Connect the manometer hose.
4. Open the gas supply to the heater.
5. Turn on the heater.
6. Take the gas pressure reading.
7. Turn off the heater.
8. Shut off the gas supply to the heater.
9. Disconnect the manometer hose.
10. Tighten the small screw inside the pressure tap.
11. Open the gas supply to the heater.
12 Verify that the seal connection in the pressure tap is closed by testing
for leaks with soapy water.
Note: If the pressure reading is out of range, (see Table 3), regulate the
incoming gas pressure.
INLET GAS PRESSURE REQUIREMENTS
D
s e
i r c
i t p
n o
y T
2
; H
E 2
+
2 ;
; N
a N
u t
l a r
G
s a
G (
0 2
P 3
P
o r
a p
e n
G
s a
N
O
T
: E
T
e h
m
n i
m i
u
m
v
l a
e u
p a
r p
v o
d e
r o f
m
x a
m i
u
m
u s
p p
y l
r p
s e
u s
. e r
l l A
e r
d a
n i
s g
m
s u
b t
t e
k a
n e
w
h
e l i
h
a e
r e t
m
a
e d
w
h
e l i
h
a e
r e t
s i
f f o
i w
r l l
s e
t l u
n i
e p
Table 3.
This appliance is equipped with an unconventional gas control valve that is factory set with a manifold pressure of
1.1 ± 0.5 mbar. Installation or service must be performed by a qualified installer, service agency, or the gas supplier. If
this control valve is replaced, it must be replaced with an identical control. The combination gas valve incorporates dual
shut-off valves and a negative-pressure regulator. For proper operation, the regulated pressure at the outlet manifold of
the valve must be 1.1 ± 0.5 mbar below the reference pressure at the blower mixer inlet, and the gas valve 'VENT'
tap must be connected to the end cap air orifice as shown in Figure 14. DO NOT attempt to adjust the gas input by
adjusting the regulator setting. The correct gas regulator setting is required to maintain proper combustion and
must NOT be altered.
™
MASTERTEMP
Pool and Spa Heater Installation and User's Guide
All manuals and user guides at all-guides.com
GAS PRESSURE
AND
e p
G
s a
u S
p p
y l
r P
s e
u s
E 2
, s
E 2
; i
E 2
L L
2
- 0
5 2
m
b
r a
G /
2
) 5
G (
3
) 1
7 3
m
b
r a
n i
u p
a t
j d
s u
m t
e
. t n
D
o
o n
e t
c x
e e
t d
e h
s i
o
e p
a r
n i t
. g
A
y n
a
j d
s u
m t
n e
s t
r o
e r
d a
o f r
m r
n a
e c
r p
b o
e l
m
. s
WARNING
Figure
14.
Figure 14.
e r
n i
s g
Lightly loosen the
small screw inside the pressure tap,
and attach/connect the manometer hose.
P/N 475106 Rev. D 1/2016
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