background image

Part number 550-141-607/0601

Gas/Air Manifold Assembly

Part Number 382-200-355  for Series 1, 2 & 3

Part Number 382-200-362 for Series 4

GV BOILER

GV BOILER

GV BOILER

GV BOILER

GV BOILER

Replacement Instructions

Replacement Instructions

Replacement Instructions

Replacement Instructions

Replacement Instructions

These instructions are for use by a qualified installer/service technician. Failure to follow all instructions in proper
order can cause severe personal injury, death or substantial property damage.
Shut off main gas valve and disconnect electricity to boiler. Failure to do so can cause severe personal injury, death
or substantial property damage.

WARNING

This symbol is used in these instructions to indicate presence of hazards which can cause severe personal injury,
death or substantial property damage.

WARNING

1.

Remove:
Jacket top and front panels.
All hoses from gas/air manifold assembly (save to re-

install). See Figure 1.

For Series 1, 2 & 3,

 remove left-handed threaded fitting

from gas valve.

OR

For Series 4,

 remove the gas valve to manifold fitting

by removing four screws (#7 metric head) from fitting.
Gas/air manifold assembly.
Gas orifice plate (save to re-install).

2.

Install new gas/air manifold assembly. Loosely screw
in 2 back screws to support assembly.

3.

For Series 1, 2 & 3,

 align left-hand threaded fitting to

gas valve and tighten.
a. Do not clamp gas tubing with excessive force, as it

will deform.

b. Do not apply excessive force to gas valve.

OR

For Series 4,

 align gas valve manifold fitting to gas

valve with new O-ring in place and replace four screws
in the gas valve fitting.

Weil-McLain

500 Blaine Street

Michigan City, IN  46360-2388

http://www.weil-mclain.com

5.

Tighten all four screws in gas/air manifold assembly
evenly, until metal-to-metal contact is made around
entire manifold.

6.

Re-connect hoses as shown in Figure 1. Secure wire
tie or hose clamp on air inlet hose.

7.

Turn on electric and gas to boiler. Check boiler normal
sequence of operation and follow checkout procedure
in Boiler Manual.

8.

Replace jacket front and top panels.

RECOMMENDED TOOLS:

10” CRESCENT WRENCH
SMALL PIPE WRENCH
5/16” NUT DRIVER
5/16” SOCKET WITH EXTENSION
#7 METRIC WRENCH OR SOCKET
1/4” SLOTTED SCREWDRIVER

WARNING

Gas/Air Manifold
O-ring for manifold
Gas valve fitting
Miscellaneous hardware:  screws to mount manifold to
inducer housing, to mount gas valve to inducer housing,
to mount manifold fitting to gas valve, plastic tie wrap to
re-attach condensate trap to manifold.
Instructions

Contents of Kit:

Figure 1

WARNING

Carefully seat O-ring in manifold fitting
groove to insure proper fit as manifold
fitting is mated to gas valve. Failure to do
so can result in a fire or explosion causing
severe personal injury or property
damage.

4.

Slide in gas orifice plate and re-install two front screws
in gas/air manifold assembly.

Do not disassemble blower housing. A
fire or explosion causing severe
personal injury or property damage can
result.

Reviews: