Millivolt Wiring Diagram; Millivolt System; Electronic Ignition System - Hayward H150 Installation, Operation And Service Manual

LIMIT SWITCH
R
TERMINAL BLOCK
REMOTE CONTROL
IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE HEATER
MUST BE REPLACED, IT MUST BE REPLACES WITH APPLIANCE
WIRING MATERIAL SUITABLE FOR 105ºC (STYLE 1015 OR 1230)
OR ITS EQUIVALENT.

Millivolt System:

The millivolt operated heater is equipped with a standing
pilot and a thermopile (pilot generator). All of the electric current
required to operate the controls within the heater is provided by
the pilot generator. No external wiring or electrical connections
are required. The system consists of seven separate controls
wired in series with the gas valve. All switches in these controls
must be "closed" for the main gas valve to open and allow the
heater to operate. The individual controls are described in the
Maintenance/Servicing section of this manual. Figure 30 shows
the heater wiring for millivolt operated systems.

Electronic Ignition System:

The electronic ignition system is equipped with the same
basic controls as the millivolt operated heater but a direct spark
ignition device (DS) is used to automatically light the main burn-
ers on each call for heat. With the DS module these controls
operate on 24 volts so an external power source is required.
All wiring connections to the heater must be made in ac-
cordance with the latest edition of the National Electrical Code
ANSI/NFPA 70, unless local code requirements specify other-
wise. In Canada, follow CSA C22.1 - CANADIAN ELECTRICAL
CODE, Part 1.
Since an external electrical source is utilized, the heater,
when installed, must be electrically grounded and bonded in ac-
WIRING DIAGRAM - MILLIVOLT - SINGLE THERMOSTAT
LIMIT SWITCH PRESSURE SWITCH
V BL
BK
JUMPER
SYSTEM SWITCH
ON
Y GY
OFF
Figure 30: Wiring Diagram - Millivolt
TEMPERATURE
LIMITER SWITCH
R BK
TEMPERATURE
LIMITER (MANUAL)
SWITCH
SPA/POOL
P
T'STAT
BK
GENERATOR
cordance with local codes, or in the absence of local codes, with
the National Electrical Code, ANSI/NFPA 70.
The H-Series heater can be installed with the electrical con-
nections, service entry/remote control, located on either the left
or right side of the heater. Punch out the knockout slug adjacent
to the controls compartment on either or both sides as neces-
sary.
The heater is supplied with a dual voltage transformer for
either 120 volt or 240 volt power supply. If the heater is to be
wired in series with the pump, the electrical circuit draws only
0.3 amps. Use a 15 amp circuit breaker if heater is wired to a
separate circuit.
Field wiring connections are to be made inside the junction
box located behind the control access door. For a heater pow-
ered by a 120V source, refer to the wiring diagram and connect
the power supply to the black (common) lead and the white
(120V) lead. See Figure 31. For a pool heater powered by a
240V source, refer to the wiring diagram and connect the power
supply to the black (common) lead and the orange (240V) lead.
See Figure 32. A ground lead is provided inside the junction box
for connection of green insulated ground wire. Replace junc-
tion box cover and close access panel upon completion of field
wiring.
Figure 33 shows the heater wiring for electronic ignition
systems.
SECTION 3. INSTALLATION
GAS
VALVE
ROBERTSHAW
TH
TP
TH
TP
GAS
VALVE
HONEYWELL
THPP
PILOT
TH
PP
W
R
15