Install Instructions

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Flue Pipe
Note: Type “L” vent material is generally considered to be not
suitable for this application. Flue temperatures may exceed
572°F . Use flue piping approved for this installation.
Long horizontal flue pipes, excessive number of tees and
elbows or other obstructions restrict flue gas flow, and can
result in the possibility of condensation, flue gas leakage and
carbon monoxide emissions. These conditions can lead to
serious property damage, severe bodily injury or death. The
flue pipe should be the same size as the breech connection
on the appliance. The sizes generally are 6 in. for burners
rated less than 1.00 GPH and 7 in. for burners rated 1.00
to 1.50 GPH. The flue pipe should be as short as possible
and installed so that it has a continuous rise of 1/4 in./ft. of
horizontal length from the breech connection on the appliance
to the chimney. Elbows should be minimized and the sections
of pipe and fittings should be joined with sheet metal screws
and straps. Routing should be made in such a way as to
avoid sharp turns or unduly long runs. It is recommended that
the heater be piped to its own individual flue. Where there
is only one flue for both furnace and water heater, various
methods are practiced in which the water heater flue enters
the chimney above the main smoke pipe. Also, a “Y” fitting is
frequently used to combine the heater and furnace flues, prior
to entering the chimney connection (see Figure 4, check with
local authorities having jurisdiction). Obtain a gas-tight seal
to prevent possible flue gas leakage and carbon monoxide
emissions, which can lead to severe bodily injury or death.
Draft Regulator
This device is used on conventional chimney venting only. It
automatically maintains a constant negative pressure in the
chimney to obtain maximum efficiency. If the chimney does
not develop sufficient draft, the draft control cannot function
properly. The heater must be equipped with an approved
draft regulator of adequate size. Ensure the draft regulator
diameter is at least as large as the flue pipe diameter. Follow
manufacturers recommended instructions for installation. It
must be installed in the flue pipe before it enters the chimney
and after the Blocked Vent Safety Switch. Set the draft
regulator at -0.03 in. w.c. (-7.46Pa), as measured in the flue
(between the heater and the draft regulator). Recommended
over-fire draft is -0.02 in. w.c. (-4.97Pa).
Chimney
Be sure that the chimney is sufficiently high and large enough
to meet the specifications of the burner unit installed. Check
that there is sufficient draft for the proper burning of oil. At least
-0.015 in. w.c. (-3.73Pa) of over-fire draft is recommended.
Blocked Vent Safety Switch
Oil-fired water heaters must be fitted with the blocked vent
safety switch supplied with your heater. The installation
procedure is given below. For further details and information
refer to the instruction sheet supplied with the switch (Not
required for JW6 F307V).
Installation
1. Pierce a 5/8 in. dia. hole into the flue pipe 12 to 18 in. from
the breech connection of the water heater. Remove one
of the securing nuts from the pipe of the safety switch.
Tighten the other securing nut onto the pipe as far as
possible.
2. Insert the threaded pipe end into the pierced hole, then
install the securing nut, which was removed in step 1,
and tighten securely.
Caution: Turn "OFF" the electrical supply to the water heater
when wiring safety switch.
3. Wire the safety switch in series with L1 of the electrical
supply. Install and route wiring in an accordance with
“National Electrical Code. (NFPA 70)” and any
applicable local codes.
Caution: If for any reason the system has shut down
during operation, the cause of the system failure should be
investigated and corrected before resetting the safety switch
and re-starting the system.
Power Venting
Models JW6 F307, JW6 F507 and JW F657 may be power
vented with a Field SWGII 4HD Power Venter. The following
control kits may be used with the SWGII 4HD:
CK 61 Electronic Post Purge.
CK 62 Thermally Activated Post Purge.
Printed on 7/3/2019 7:21 AM CT