Laars Pennant PNCP Installation And Operation Instructions Manual - page 11
Pennant Pool Heater
Page 11
Distance from Gas Meter
or Last Stage Regulator
Model and
Gas Type
0-100' 0-31m 100-200'31-61m 200-300'61-91m
500 natural
1-1/2" 3.8cm
2"
5.1cm
2"
5.1cm
500 propane
1"
2.5cm
1-1/2"
3.8cm
1-1/2"
3.8cm
750 natural
2"
5.1cm
2"
5.1cm
2-1/2"
6.4cm
750 propane
1-1/2" 3.8cm
1-1/2"
3.8cm
2"
5.1cm
1000 natural
2"
5.1cm
2-1/2"
6.4cm
3"
7.6cm
1000 propane 1-1/2" 3.8cm
2"
5.1cm
2-1/2"
6.4cm
1250 natural
2-1/2" 6.4cm
2-1/2"
6.4cm
3"
7.6cm
1250 propane 2"
5.1cm
2"
5.1cm
2-1/2"
6.4cm
1500 natural
2-1/2" 6.4cm
3"
7.6cm
3"
7.6cm
1500 propane 2"
5.1cm
2-1/2"
6.4cm
2-1/2"
6.4cm
1750 natural
2-1/2" 6.4cm
3"
7.6cm
3"
7.6cm
1750 propane 2"
5.1cm
2-1/2"
6.4cm
2-1/2"
6.4cm
2000 natural
3"
7.6cm
3"
7.6cm
3-1/2"
8.9cm
2000 propane 2-1/2" 6.4cm
2-1/2"
6.4cm
3"
7.6cm
Notes:
1. These figures are based on 1/2" (0.12kPa) water column
pressure drop.
2. Check supply pressure and local code requirements before
proceeding with work.
3. Pipe fittings must be considered when determining gas pipe
sizing
.
Table 7. Gas Piping Size.
4.
Run gas supply line in accordance with all
applicable codes.
5.
Locate and install manual shutoff valves in
accordance with state and local requirements.
6.
A sediment trap must be provided upstream of
the gas controls.
7.
All threaded joints should be coated with piping
compound resistant to action of liquefied
petroleum gas.
8.
The appliance and its individual shutoff valve
must be disconnected from the gas supply piping
during any pressure testing of that system at test
pressures in excess of 1/2 PSIG (3.45kpa).
9.
The unit must be isolated from the gas supply
system by closing its individual manual shutoff
valve during any pressure testing of the gas
supply piping system at test pressures equal to or
less than 1/2 PSIG (3.45kpa).
10.
The appliance and its gas connection must be
leak tested before placing it in operation.
11.
Purge all air from gas lines.
Caution
Do not use open flame to check for leaks.
NOTE: The Pennant appliance and all other gas
appliances sharing the gas supply line must be firing
at maximum capacity to properly measure the inlet
supply pressure. The pressure can be measured at
the supply pressure port on the gas valve. Low gas
pressure could be an indication of an undersized gas
meter, undersized gas supply lines and/or an
obstructed gas supply line. The Pennant may not fire if
the gas pressure lower than 5" w.c.
SECTION 4.
Water Connections
Hot water piping should be supported by suitable
hangers or floor stands. Do not support piping with
this appliance. Due to expansion and contraction of
copper pipe, consideration should be given to the type
of hangers used. Rigid hangers may transmit noise
through the system resulting from the piping sliding in
the hangers. It is recommended that padding be used
when rigid hangers are installed. Maintain 1"
clearance to combustibles for hot water pipes.
Pipe the discharge of the relief valve (full size) to
a drain or in a manner to prevent injury in the event of
pressure relief. Install shutoff valves where required
by code.
Pennant Pool Heaters are equipped with mounted
pumps, which serve the heater plus 30 feet of full-
sized piping with a normal number of fittings. If the
pool’s loop is more than 15 feet away from the heater,
please contact the factory.
A mixing system is shipped with the heater, to be
mounted in the field. The system consists of a three-
way valve, temperature control and piping. The
temperature sensor for the control is in the heater inlet.
When the control detects water temperature that is
below 120°F (49°C), it will direct the three-way valve
to actuate, which sends water from the outlet of the
heater back to the inlet. The outlet water that is
diverted to the inlet mixes with the return water from
the pool, and keeps the inlet temperature at or above
120°F (49°C) (see Figure 4). This keeps cold return
water from causing condensing on the outside of the
Pennant heat exchanger.
See Figure 5 for proper connection of the
Pennant heater to the pool loop.
Figure 4. Mixing System.
4.2 Automatic Chlorinators
A concentration of chlorine in the heater can be
very destructive; therefore the following rules about
the installation and operation of such devices must be
followed: