Reznor Door Air Heater Option User Manual

OPTION BX1,

OVERHEAD DOOR

SWITCH

®

Applies to: "Door Air Heater" Application

Installation Form RZ-NA-I-OPT -DS

Obsoletes Form RGM 400-DS

Description/Application

Although this overhead door is referred to as an option, it is a require­ment for Reznor
application (A.G.A. certified to ANSI Z83.17 or C.G.A. approved to
CAN 1-3.12).

The switch is a Honeywell Micro-Switch precision limit switch (P/N

124253). The function of the switch is to energize and interlock the heat­ing unit when an outside overhead door reaches approximately 80% of
full open travel. The switch will de-energize the furnace when the over­head door closes approximately 20%. The complete door switch includes
a limit switch electrically wired to the heater and a roller yoke for me­chanical activation by a field-supplied trigger on the overhead door.

Installation should be done by a qualified agency in accordance with the
instructions that follow and in compliance with all codes and require­ments of authorities having jurisdiction. The agency performing this work
assumes responsibility for this installation.

All electrical wiring and connections, including electrical grounding
MUST be in accordance with the National Electric Code ANSI/NFPA
No. 70 (latest edition) or, in Canada, with the Canadian Electrical Code, Part 1-C.S.A. Standard C22.1. In addition, the installation must comply with
local ordinances and applicable gas company requirements.

®

makeup air systems installed in a "door air heater"

Option BX1, Overhead Door Switch (P/N 124253)

REQUIRED
FOR ALL
DIRECT-FIRED
"DOOR AIR
HEATER"
APPLICATIONS

Switch Models and Specifications, Honeywell

Micro-switch #LSNIA-3P
Dimensions 4.2" H x 2.4" W x 1.9" D
Electrical Rating 10 Amp continuous at

230, 240, 480 or
600 VAC

60 Amp make and 6 Amp
break at 120 VAC

Contacts SPDT maintained, 1 set

normally open and 1 set

normally closed.
Ambient Rating 30oF to 240oF
Actuation Twin yoke roller lever

(rollers are at a 90o angle)
Operating Force 4 lbs
NEMA Enclosure 3, 4, 6P and 13

Installation Instructions

Before beginning installation, read both the switch manufacturer's instructions and the "LEFT" and "RIGHT" instructions below. Follow all instruc­tions carefully. In all cases, disconnect both the electrical power and the gas supply from the heater during installation of the door switch.

The switch is tapped for a 1/2" threaded (field-supplied) conduit connection. The electrical connection must be sealed and the switch positioned

so that moisture will not enter through the connection. See switch specifications and heater wiring diagram for electrical information.

For installation indoors on the LEFT side of an automatic
overhead door:

WITH DOOR IN CLOSED POSITION. . .

1. Mount the switch and the field-supplied activation trigger in loca-

tions so that mechanical contact will be made when the overhead
door is approximately 80% open. Secure the switch through the front
using two #10 x 2" long sheetmetal screws or through the back using
two #10 x 32 x 2" long studs. Attach field-supplied conduit connec­tion.

2. Loosen the two screws on the front of the switch that retain the termi-

nal access cover. Remove the cover exposing four wire terminals.
Pull the appropriate gauge
(no smaller than 18 gauge
and no larger then 12
gauge) protected control
wire through the conduit
connection. Attach the
conduit. Connect the wires

to pressure terminals #3
and #4. Connect the

ground wire.

3. Using a 9/64" allen

wrench, attach the roller
yoke in the position illus­trated in Figure 1. The
field-supplied door activa­tion trigger must mechani­cally activate the rollers
during both the opening
and closing of the over­head door.

©2014 Reznor, LLC. All rights reserved. Printed In the U.S.A.
Trademark Note: Reznor
0514 POD OG Form I-OPT-DS (Version 0.1)

®

is registered in the United States and other countries.

Figure 1 - Roller Yoke Position
for "Left" Side Installation
(Door Closed)

For installation
overhead door:

indoors on the RIGHT side of an automatic

WITH DOOR IN CLOSED POSITION. . .

1. Mount the switch and the field-supplied activation trigger in loca-

tions os that mechanical contact twill be made when the overhead
door is approximately 80% open. Secure the switch through the front
using two #10 x 2" long sheetmetal screws or through the back using
two #10 x 32 x 2" long studs. Attach field-supplied conduit connec­tion.

2. Loosen the two screws on the front of the switch that retain the termi-

nal access cover. Remove the cover exposing four wire terminals.
Pull the appropriate gauge
(no smaller than 18 gauge
and no larger then 12
gauge) protected control
wire through the conduit
connection. Attach the
conduit. Connect the wires

to pressure terminals #1
and #2. Connect the

ground wire.

3. Using a 9/64" allen

wrench, attach the roller
yoke in the position illus­trated in Figure 2. The
field-supplied door activa­tion trigger must mechani­cally activate the rollers
during both the opening
and closing of the overhead
door.

Figure 2 - Roller Yoke Position

for "Right" Side Installation

(Door Closed)

Mfg P/N 124765