ULTRATEMP ETI™ Hybrid Heater Installation and User’s Guide
11
Water Pressure Switch Adjustment
(cont.)
7. Check the setting of the water pressure switch by
starting and stopping the filter pump and checking
the control panel and operation of the heater between
each flow change.
8. If the water pressure switch cannot be adjusted to
accommodate the conditions listed above, an external
flow switch must be added to the plumbing system
to ensure that the heater will not operate without the
proper flow through the heat exchanger.
The following adjustment is for installations where the
heater is
above
pool water level.
1. Be sure that all valves in the system are set to allow
water flow through the heater. Start the filter pump.
2. Set the heater temperature above the actual
temperature to call for heat. Turn the heater ON.
3. If the LCD shows a “LOW WATER FLOW” Alarm and
red SERVICE light is present then the water pressure
switch needs to be adjusted.
4. Remove the UltraTemp ETi™ Hybrid Heater’s left front
panel and remove remaining right front panel. The
water pressure switch is located in the water plumbing
in the lower corner of the heater.
5. Slowly rotate the adjustment wheel on the water
pressure switch in a counterclockwise direction until
the “LOW WATER FLOW” Alarm and red SERVICE
light vanish, time delay countdown will start.
6. Once the heater is running, turn off the filter pump. The
heater should turn off immediately.
7. If the heater continues to operate when the filter pump
is off, turn the adjustment wheel on the water pressure
switch in a clockwise direction until the “LOW WATER
FLOW” Alarm shows on the LCD, the red SERVICE
light turns ON, and the heater stops.
8. Check the setting of the water pressure switch by
starting and stopping the filter pump and checking
the control panel and operation of the heater between
each flow change.
9. If the water pressure switch cannot be adjusted to
accommodate the conditions listed above, an external
flow switch must be added to the plumbing system
to ensure that the heater will not operate without the
proper flow through the heat exchanger.
Gas Connections
Gas Line Installation
When sizing gas lines, calculate three (3) additional feet of
straight pipe for every elbow used. When installing the gas
line, avoid getting dirt, grease or other foreign material in
the pipe as this may cause damage to the gas valve, which
may result in heater failure.
The gas meter should be checked to make sure that it will
supply enough gas to the heater and any other appliances
that may be used on the same meter. The gas line from
the meter will usually be of a larger size than the gas
valve supplied with the heater. Therefore a reduction of the
connecting gas pipe will be necessary. Make this reduction
as close to the heater as possible.
The heater requires a gas supply of no less than 4 in.
(10.2 cm) wc, and no more than 10.5 in. (27 cm) wc for
natural gas (no more than 14 in. [36cm] for propane gas).
Gas supply pressures outside of this range may result in
improper burner operation. A minimum flowing or dynamic
inlet pressure (while the heater is running) of 4 in (10.2 cm)
wc is required to maintain input rating with no more than a
2 in. pressure drop between static and dynamic. The gas
supply must be installed in accordance with the National
Fuel Gas Code, ANSI Z223.1, or standard CSA B149.1,
Natural Gas and Propane Installation Codes, as applicable
and all applicable local codes. Install a manual shut-off
valve and a sediment trap and union located outside the
heater panels, see
Figure 17
on the next page. Do not
use a restrictive gas cock. The following minimum gas pipe
sizes are recommended for natural gas supply piping, see
Table 1
below. Check for compliance with local codes.
The heater and any other gas appliances must be
disconnected from the gas supply piping system during
any pressure testing on that system, (greater than ½
PSI). The heater and its gas connection must be leak
tested before placing the heater in operation. Do not use
flame to test the gas line. Use soapy water or another
nonflammable method.
Note: A manual main shut-off valve for the heater must
be installed externally.
Do NOT install the gas line union inside the heater cabinet.
This will void the warranty.
Table 1: Gas Pipe Sizing
MAXIMUM EQUIVALENT PIPE LENGTH (FT.)
Natural Gas at 1000 B.T.U. per Cubic Ft.
Propane Gas at 2500 B.T.U. per Cubic Ft.
Model #
BTUs
3/4”
1”
1-1/4”
1-1/2”
2”
2-1/2”
NG
PRO
NG
PRO
NG
PRO
NG
PRO
NG
PRO
NG
PRO
220
110,000
50’
80’
125’
250’
450’
600’
-
-
-
-
-
-
The use of Flexible Gas Connectors (FLEX) is NOT
recommended unless they are properly sized according
to the supplier recommendations for the heater rating. In all cases, the
connectors must be bonded to the electrical service grounding point or, when
provided, the lighting protection grounding point according to the latest edition
of the National Fuel Gas Code.
ENGLISH
