Grasslin GM40AV series Installation And Operating Instructions Manual

To avoid re, shock, or death, turn off power at circuit breaker and test that power is off •
before wiring.
Read instructions completely before installation and retain for future reference.•
Observe all national and local electrical and safety codes.•
Disconnect power when servicing or changing loads.•
Alterations or modications to the device will void the warranty.•
For outdoor locations, rain-tight or wet location conduit hubs that comply with the re-•
quirements of UL 514B Conduit, Tubing, and Cable Fittings, must be used.

GM40AV Series General Purpose
Electromechanical Commercial Time Switches

To avoid re, shock, or death, turn off power at the circuit breaker and test that 1.
power is off before wiring.
Open door and remove the interior protective cover by releasing the spring 2.
latch (see gure 1 below).
Remove the printed circuit board by releasing the spring latch holding the bot-3.
tom of the board (see gure 2 below).
Select knockouts to be used. Remove the inner 1/2” knockout by inserting a 4.
athead screwdriver in the slot and carefully punch the knockout loose. Re­move slug. If 3/4” knockout is required, remove the outer ring with pliers after
removing the 1/2” knockout. Smooth edge with knife, if necessary.
Place the enclosure in the desired mounting location, and mark the three 5.
mounting holes (refer to Figure 3 below for dimensions). Install the top screw
rst with one of the supplied spacers, and then hang the enclosure by the key­hole. Drive the remaining two screws at the bottom of the enclosure through
the mounting holes while passing each screw through one of the supplied
spacers and in to the wall.
Connect conduit hubs to conduit before connecting the hubs to the enclosure. 6.
After inserting hubs into enclosure, carefully tighten hub lock nut. Do not over­torque.
Replace printed circuit board making sure to engage spring latch at the bot-7.
tom of PCB.
Wire in accordance with national and local electrical and safety codes (see 8.
wiring diagrams on page 3).
Grounding: Terminate all ground wires to the ground lug inside the case at the 9.
bottom of the enclosure.
Replace interior protective cover. 10.

INSTALLATION INSTRUCTIONS

ELECTRICAL RATINGS

N.O. Contacts:

40A Resistive @ 120~277VAC

1HP, 16FLA, 90LRA @ 120VAC
2HP, 12FLA, 52LRA @ 208~277VAC
30A Ballast @ 120VAC
20A Ballast @ 277VAC
15A Tungsten @ 120VAC
300VA Pilot Duty 120~240VAC

N.C. Contacts:

30A Resistive @ 120~277VAC

1HP, 12FLA, 30LRA @ 120VAC
2HP, 10FLA, 30LRA @ 240VAC
2A Tungsten @ 120VAC
10A Ballast @ 277VAC

WIRING CONNECTIONS:

Screw box lug terminals

ENVIRONMENTAL RATINGS:

Operating Temperature Range:

–40°F to 131°F (–40°C to 55°C)
Operating Humidity:
10 - 95% RH, non-condensing

ENCLOSURE DIMENSIONS:

8.795” x 6.631” x 2.935”

(H x W x D)

SHIPPING WEIGHT:

2 lbs.

AGENCY APPROVALS:

UL Listed

SETTING THE CLOCK TIME

Rotate the program dial gradually clockwise until the time of day on the outer
dial is nearly aligned with the triangle marker at the 2 o’clock position. Then set
time to the minute by rotating minute hand clockwise until the time of day (and
AM or PM) on the outer dial is aligned with the triangle marker on the inner dial.

NOTICE! Do not rotate the dial or minute hand counter-clockwise. Doing
so will damage the timer.

SETTING ON/OFF TIMES

Move the white tab (tripper) on the outer dial outward at the start of the desired
ON period. Move each adjacent tab outward until the desired OFF time is
reached.
(See illustrations on page 2)

PROGRAMMING INSTRUCTIONS

Figure 3 - Rear View of Enclosure

with mounting hole dimensions

6-1/8”

2-1/2”

Figure 2 - PCB LatchFigure 1 - Spring Latch

Interior
Protective
Cover

Timer Mechanism

WARNING

TRIPPERS IN

Relays: OFF - Green Status LED: OFF

(Normally-open contacts open)

TRIPPERS OUT

Relays: ON - Green Status LED: ON

(Normally-open contacts closed)

MANUAL OVERRIDE OPERATION

With the manual switch in the middle position, the GM40AV is in

automatic mode and will switch at the programmed times.

In the upper position “I”, the load is continuously ON.

In the lower position, “O”, the load is continuously OFF.

Moisture Resistant

Conformal Coated

Board

40 Amp

Rated Contacts

Automatic Voltage Selection From 120 VAC to 277 VAC

Captive Trippers

Can’t Be Lost

Independently

Adjustable Trippers at

15 Minute Intervals

Real Time Clock Face

for faster and easier

time setting

Manual Override Switch

Large Screw Terminals

for Easy Wiring

up to #8 AWG

Large Ground Lug

Termination

New UL Type 3R

Enclosure for

Indoor or Outdoor

Installation

Yellow and Green

LED Lights Indicate

Power and Status

SPECIFIERS GUIDE

APPLICATION

The GM40AV Series Time Controls are universal, electronic time switches designed for general purpose commer­cial applications. The control operates on any AC voltage from 120VAC to 277VAC. The mechanism is mounted in
an enclosure and has been designed for the control of lighting, heating, air conditioning, pumps, motors, or general
electrical circuits in residential, commercial, industrial and agricultural facilities.

Furnish and install an Intermatic GM40AV Auto-Volt Series with 24 hour mechanical timer. The Auto-Volt input volt­age range shall be 120VAC to 277VAC. All units shall incorporate two isolated sets of SPDT contacts that are each
rated at 40A, 2 HP @ 277V. LED indicators shall provide Power and Status feedback. Enclosure shall be UL Type
3R, suitable for indoor or outdoor installation

.

2

Interior protective cover and door not shown