Installation Of The Aquastat (Temperature Control); Electrical Supply - John Wood JWF307 Installation And Operating Instructions Manual

Installation Of The Aquastat
(Temperature Control)
This heater operates automatically under the control of the
aquastat, which responds to the demand of hot water.
Depending on the model, the aquastat well and wiring is
either installed on the heater, or included in the carton con-
taining the burner. If the installation of the aquastat is
required, proceed as follows:
1. Locate the aquastat well opening in the front of the
heater.
2. Apply a good grade of pipe joint compound to the
threads on the well.
3. Install the well in the tank opening, tighten firmly to
ensure there are no leaks.
4. Insert the sensing bulb of the aquastat into the well and
secure the aquastat to the well using the screw provid-
ed.
5. Wire the control to the burner as shown in the wiring dia-
grams (Figures 9, 10 & 11).
R7184
T
JUMPER
T3
ENVIRACOM™
2
TERMINAL
1
TO
REMOTE
ALARM
ALARM
CIRCUIT
R7184
T
JUMPER
T3
ENVIRACOM™
2
TERMINAL
1
TO
REMOTE
ALARM
ALARM
CIRCUIT
L1
BLACK
LIMIT
RED
L2
WHITE
VALVE
VIOLET
BURNER
MOTOR
ORANGE
IGNITOR
BLUE
YELLOW
CAD
CELL
YELLOW
BURNER JUNCTION BOX
L1
BLACK
L2
WHITE
VALVE
VIOLET
BURNER
MOTOR
ORANGE
IGNITOR
BLUE
YELLOW
CAD
CELL
YELLOW
BURNER JUNCTION BOX

Electrical Supply

General wiring requirements:
Electric shock hazard. Can cause severe personal injury or
death if power source, including service switch on heater, is
not disconnected before installing or servicing. Installations
must comply with the latest editions of these codes:
•
"Canadian Electrical Code Part 1 (CSA C22.1)"
(Canada).
•
"National Electrical Code, ANSI/NFPA 70", (USA).
•
Any additional local, provincial, national or state codes.
Wiring must be N.E.C. Class 1. If original wire supplied with
the heater is to be replaced, TYPE 105°C wire or equivalent
must be used. Supply wiring to heater and additional control
wiring must be 14 GA. or heavier. Provide an electrical
ground as required by codes.
LINE VOLTAGE
THERMOSTAT OR
LIMIT
AQUASTAT®
CONTROL
OIL VALVE
BURNER
MOTOR
IGNITOR
CAD
CELL
Figure 9 Typical Primary Control Wiring
LINE VOLTAGE
THERMOSTAT OR
LIMIT
AQUASTAT®
CONTROL
OIL VALVE
BURNER
MOTOR
IGNITOR
CAD
CELL
Figure 10 Typical Primary Control Wiring
– 14 –
BLOCKED
L2 NEUTRAL
VENT
SAFETY
SWITCH
(R7184P).
BLOCKED
L2 NEUTRAL
VENT
SAFETY
SWITCH
(R7184B).
L1 HOT
L1 HOT