Johnson Controls A70 Series Data Sheet

A70 Series

Line 2

Line 1

M1

M2

Action on Increase

on Temperature

a70s.eps

A70 Series Action Diagram

A70GA-1 Temperature Control

Single-Stage Electromechanical Temperature Controls

Code No. LIT-1927140

A70 Series Four-Wire, Two-Circuit Temperature Control

Description

The A70 Series Temperature Control
incorporates a vapor-charged sensing
element. The A70G, A70H, and A70K have a
four-wire, two-circuit contact block that
contains two isolated sets of contacts.

The contacts are designed so that when the
main contact opens, the auxiliary contact
closes.

Refer to the A70, A72 Series Temperature

Controls for Refrigeration and Heating

Product Bulletin (LIT-125155) for important

product application information.

Features

• long-life, snap-acting contacts

• automatic or manual reset models

Applications

Typical applications include energizing an
indicator light after a low temperature cutout on
a ventilating system.

Selection Charts

A70 Series Four-Wire, Two-Circuit Temperature Control

Product Code
Number

A70GA-1C

A70GA-2C 35 to 80

A70HA-1C
A70HA-2C 35 to 80

A70HA-14C 15 to 55

A70KA-1C Open high Close high 100 to 170

1. On these models, the low cutout stop is set and sealed at 35°F (1.6°C). It cannot be set lower. The control responds only to the lowest temperature
along any 14 to 16 in. section of the entire 20 ft element.

Main Contacts Auxiliary Contacts

1

1

Open low Close low

Replacement Covers

Product Code Number Description

CVR17A-620R Automatic reset cover
CVR17A-621R Manual reset cover

Switch Action Range

°F (°C)

15 to 55
(-9.4 to 12.8)

(1.7 to 26.7)

15 to 55
(-9.4 to 12.8)

(1.7 to 26.7)

(-9.4 to 12.8)

(37.8 to 76.7)

Differential
F° (C°)

5 (2.8) 20 ft of 1/8 in.

3 to 30
(-16.1 to -1.1),
factory set at 12 (-11.1)

Manual reset

Bulb and
Capillary

O.D. tubing
3/8 in. x 3 in.

6 ft capillary

20 ft of 1/8 in.
O.D. tubing

3/8 in. x 3 in.
6 ft capillary

20 ft of 1/8 in.
O.D. tubing

3/8 in. x 3 in.
6 ft capillary

Maximum Bulb
Temperature °F (°C)

400 (204.4)

250 (121)

400 (204.4)

250 (121)

400 (204.4)

240 (116)

Range
Adjuster

Screwdriver
slot

Technical Specifications

Electrical Ratings

Pole Number LINE-M2 (Main) LINE-M1 (Auxiliary)

Motor Ratings VAC 120 208 240 277

AC Full Load A 16.0 9.2 8.0 — 5.0 4.8 6.0 3.4 3.0 —
AC Locked Rotor A 96.0 55.2 48.0 — 30.0 28.8 36.0 20.4 18.0 —
AC Non-Inductive A 16.0 9.2 8.0 7.2 — — 6.0 6.0 6.0 6.0
Pilot Duty – Both Poles 125 VA, 120 to 600 VAC and 57.5 VA, 120 to 300 VDC

1. Not compressor motor loads.

The performance specifications are nomina l and con form to accep table ind ustry stand ards. For applicati ons at con ditions be yond these specification s, consult th
Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc.

R-40

480

1

600

1

120 208 240 277