Honeywell M436A, M836A, M836B Installation Guide
M436A/M836A,B Damper Motors
INSTALLATION INSTRUCTIONS
FEATURES
• Motors provide two-position zone control.
• Used to operate outdoor air dampers for combustion
or makeup air, changeover dampers for heating and
cooling systems, minimum position dampers for
ventilation and similar applications.
• Damper motors have an internal spdt switch for
controlling auxiliary equipment, additional motors, or
to provide a burner interlock switch.
• M436 Damper Motors require 120 or 240 Vac, 60 Hz
power; M836 Damper Motors require 24 Vac, 60 Hz
power.
• All models are supplied with a case and cover.
• Spring returns motor to start position in event of
power interruption or failure.
• Hexagonal output shafts on both ends of motor with
rotational direction stamped on motor case.
• M436A and M836A equipped with thermal breaker for
APPLICATION
M436A/M836A,B Damper Motors are spring return (SR)
motors used for residential and light commercial applications
in Series 40 and Series 80 circuits.
A 2-wire, line voltage thermostat or other line voltage, spst
controller must be used to control the M436A. A 24V spst
controller or thermostat without heat anticipation is required to
operate the M836A. The M836B requires 24V thermostat with
a 0.75 A heat anticipator adjustment.
Each damper motor is supplied with a shaft coupling assembly
and a crank arm assembly. With these accessories the motor
shaft may be connected to the damper shaft directly or
through a linkage.
overload protection during lifting stroke or when motor
stalls.
• M836A Damper Motor with 128499 Bracket directly
replaces M87A Damper Motor.
• These damper motors operate:
— Outdoor air dampers for combustion air in boiler
rooms.
— Backdraft dampers for exhaust fans.
— Outdoor air inlet dampers for industrial makeup air
units.
— Changeover dampers for heating and cooling sys-
tems.
— Minimum position damper for ventilation from outdoor
air.
— Two-position zone control dampers.
— Both motor types have an adjustable auxiliary switch
(spdt) for operating auxiliary equipment or cascading
motors, or to act as a burner interlock switch.
60-2119-05
M436A/M836A,B DAMPER MOTORS
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
an individual unit may not exactly match the listed
specifications. Also, this product is tested and calibrated under closely controlled conditions and some
minor differences in performance can be expected if
those conditions are changed.
TRADELINE® Models:
TRADELINE® models are selected and packaged to provide
ease of stocking, ease of handling, and maximum replacement value. TRADELINE® model specifications are the
same as those of the standard models except as noted
below.
TRADELINE® Models Available:
M436A Damper Motor: 120 or 240 Vac, 60 Hz.
M836A,B Damper Motors: 24 Vac, 60 Hz.
Accessories: See Table 1. Crank arm, mounting bracket
#198545, and shaft coupling bag assemblies are included
with motors; brackets listed in Table 1 must be ordered
separately.
Table 1. Accessories Available
Type Bag Assembly
Bag Assembly
Part Number
Bracket
Included
Bracket
Height
Bracket 16254AC 128499 2.25 in.
Bracket - Mounting 7640JM 126809 N/A
Bracket 7640JN 126336 0.5 in.
Crank Arm 7640JL N/A N/A
Shaft Coupling 7640JE N/A N/A
Bracket 198545 198545 2.25 in.
Additional Features:
TRADELINE® pack with cross reference label and instruction
sheet.
Standard Models (See Table 2):
M436A Damper Motor: 120 or 240 Vac spring return motor for
use with two-wire thermostats or other spst controllers.
Includes internal adjustable spdt switch for controlling auxiliary equipment.
M836A Damper Motor: 24 Vac spring return motor for use with
spst controllers without heat anticipation. Includes internal
adjustable spdt switch for controlling auxiliary equipment.
M836B Damper Motor: 24 Vac spring return motor for use with
spst controllers. If circuit has thermostat heat anticipation,
set the anticipator at 0.75A. Includes internal adjustable
spdt switch for controlling auxiliary equipment.
Table 2. M436/M836 standard models.
Nominal Current
Model
Number
Voltage
(Vac)
(amperes)
M436A 120 0.37 0.12 27.0 8.5 20 30 30
240 0.19 0.06 27.0 8.5
M836A 24 1.85 0.6 27.0 8.5 20 30 30
M836B 24 1.34 0.73 20.3 11.2 15 30 25
a
Breakaway torque is available to overcome an occasionally frozen or seized damper or valve. The motor must not be used
Nominal Power
(watts)
Maximum
Load Torque
(lb-in.)
Breakawa
y Torque
(lb-in.)
Opening
a
Time
(nominal)
(nominal)
(nominal)
(sec)
b
Closing
b
Time
(sec)
25
(nominal)
25
(nominal)
25
(nominal)
Damper
Blade Area
(sq ft)Opening Holding Opening Holding
13
13
10
continuously at this rating.
b
40 sec maximum.
Ambient Temperature Rating: 32° to 125°F (0° to 52°C).
Finish: Gray.
Table 3. Auxiliary switch ratings (in amperes).
Power 120 Vac 240 Vac
Dimensions: See Fig. 1.
Approvals:
Full Load 7.2 3.6
Locked Rotor 43.2 21.6
Underwriters Laboratories Inc. Listed (M436A, M836A):
File No. E4436, Guide No. XAPX.
Auxiliary Switch Action:
Spdt, normally open (R-B) contacts close during the power
Auxiliary Switch Ratings (In Amperes): See Table 3.
Pilot Duty: 40 VA at 120 or 240 Vac.
stroke and open during the return stroke. Can be adjusted
to operate at any point between 5 and 70 degrees of motor
stroke.
60-2119—05 2
M436A/M836A,B DAMPER MOTORS
1
(25)
1-1/2
(38)
4-5/8 (118)
4-5/8 (118) 4-5/8 (118)
1-5/8 (42)
1-5/8
(42)
3-3/4
(96)
3-17/32 (90)
25/32
(20)
29/32 (23)
3-3/4 (96)
1-3/4
(45)
1-3/8
(35)
4-1/2
(115)
1-1/8
(29)
COMBINATION
KNOCKOUT FOR
1/2 INCH AND
3/4 INCH CONDUIT
KNOCKOUT FOR 1/2 INCH CONDUIT
M9950
OPEN CLOSE
Angular Stroke: 75 degrees.
Weight: 4 lb, 10 oz (2.1 kg).
Optional Specifications:
M436 with crank arm.
M436A Damper Motor, 50 Hz for international applications.
Models for 220 or 240 Vac, with 50 second opening stroke,
25 second closing stroke. Includes ground and cover
screws and 7640JL Bag Assembly.
M836A Damper Motor, 50 Hz for international applications.
Model is for 24 Vac, with 50 second opening stroke and 25
second closing stroke. Includes ground and cover screws
and 7640JL Bag Assembly.
Accessories:
16254AC Bag Assembly, includes 128499 Mounting Bracket
and screws (see Fig. 2 and 6).
7640JE Bag Assembly, includes drive bushings, adapter, and
coupling for direct drive (see Fig. 4 and 7).
7640JL Bag Assembly, includes clamp and crank arm lever
for crank arm drive (see Fig. 5 and 6).
7640JM Bag Assembly, includes 126809 Mounting Bracket
and screws (see Fig. 3, 4 and 7).
7640JN Bag Assembly, includes 128336 Mounting Bracket
and screws (see Fig. 2 and 6).
4074BRU Bag Assembly, includes extension adapter and
screws for mounting Q607 Auxiliary Switch to M436A
Damper Motor.
Q298B Linkage, includes damper crank arms, bushings, 1/4
in. (6.5 mm) and ball joint assemblies (see Fig. 6).
Fig. 1. M436 and M836 Damper Motors dimensions in in. (mm).
3 60-2119—05
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