Submittal Sheet

Honeywell
-
T675A,B and T678A
TEMPERATURE CONTROLLERS
SPECIFICATIONS
T6758
T675A
T678A
T675A, T676A
WITH FAST-RESPONSE
SENSING ELEMENT
RADELINE MODELS
TRADELINE models are selected and packaged to provide ease of stocking. ease of handling, and maximum repla~menr value,
TRADELINE mcdel specifications are the same as those of standard models except as noted below.
TRADEUNEMODELSAVAILABLE:
T675A and T676A Temperature Controllers-see Table 1 for
TRADELINE models available.
CAPILLARY: 5 f, [IS m] long, copper (except one T675A model
with a 20 fl[6.1 m] capillary).
ADDlTlONAL FEATURES:
* All TRADELINE models include-tamper resisting inselt and
107324A Capillary Holder. (Models with fast-response sens-
ing element include 131524A Capillary Holder.)
* TRADELINE models of T675A, T678A supplied with impact
resistant Norel covers.
. TRADELINE pack with cross-reference and spaial instmct-
ion sheet.
THE T675 AND T678 TEMPERATURE CONTROLLERS REG-
ULATE THE TEMPERATURE OF AIR OR UQUIDS IN DUCTS,
PIPES, TANKS, AND BOILERS. TYPICAL USES INCLUDE
CONTROL OF DAMPERS AND VALVES IN HEATING, COOL-
ING, OR HEATtNGCOOUNG SYSTEMS.
0 T675A 0 T675B 0 T676A
- T675A has one single-pole, double-throw (spdt) switch
that breaks R-B and makes R-W at the set point on a tem-
perature rise.
- T675B Manual Reset Low Unit Limit has one single-pole,
single-throw (spst) switch that breaks at the set point on a
temperature fall, and requires manual resetting.
- T678A has two singlepole, double-throw (spdt) switches
that operate in sequence. The right switch breaks R-B and
makes R-W at the set point on a temperature rise. The left
switch breaks R-B and makes R-W if the temperature con-
tinues to rise through the interstage differential.
- T675A models available with an adjustable differential.
- T675A and T676A have set point adjustment knob on front
Of case.
- Capillary tubing allows remote mounting of sensing ek-
mat; models available with varfous lengths.
* T675A and T676A models available with a fast-response
sensing element.
* Controller can be mounted for all applications.
- Mounting accessaries available for all applications.
* Ambient temperature compensated.
* Insert supplied with TRADELINE models replaces set
point knob to discourage tampering.
TABLE l-TRADELINE MODELS AVAILABLE
T675A (1 spdt stitch)
LMfemntk4
Adjust& 3 F to 10 F [I .7 C to 5.6 C]
AdjusWe 3.6 F to 12 F 12.0 C b 6.7 C]
Fixed at 1 F lo.6 C]
Each switch: Fixed at 3 F [1.7C]
Intentage: Adjust& 3 F lo 10 F [I .7 C
to 5.6 C]
Each switch: Fixed at 3.6 F p.0 C]
Interstage: Adjust& 3.6 F to 12 F [Z.O C to 6.7 C]
aTRADELINE model also availaMe with a fast-response sensing element, indoding a 131524.A Capillary Holder
!Wb?DELNE made! also availat&witi a2Q fi (6.1 m] mppwca$Uaiy
S.H.
Form Number 63-1087
l-89
0 Honeywetl Inc. ,989