TP970 Series
CONVERTASTAT
®
Kits
REPLACEMENT DATA
GENERAL
This document provides procedures for replacing
existing Johnson, Powers, and Robertshaw thermostats
with the TP970 Series CONVERTASTAT Kit. The
appropriate kit, selected from Table 1, replaces newer
(small size) models of Johnson, Powers, or Robertshaw
vertical or horizontal pneumatic thermostats used in two
pipe applications and mounted on hollow wall (drywall)
construction with air connections made directly to the
thermostat using 5/32 in. plastic tubing, without the use
of a wall fitting.
APPLICATION
Each CONVERTASTAT Kit includes a universal wall
plate adapter, cover, and a TP970 Series Thermostat to
replace various manufacturer’s thermostats. The
thermostat cover is universal, allowing horizontal or
vertical mounting and provides windows with or without
setpoint and thermostat displays. All components
needed to create a cover to meet building requirements
are included.
INSTALLATION
When the old mounting plate is removed, retain the
screws to use for mounting the adapter plate. Cut the
existing tubes as close as possible to the thermostat. Do
not remove the antikink springs from cut tubes. Do not
allow tubes to slip inside the wall after removing the old
thermostat.
Remove Johnson Thermostat
1. Loosen top and bottom screws to remove cover.
2. Remove thermostat mounting screws from top and
bottom and remove thermostat from mounting
plate.
3. Cut tubes near air head and temporarily plug main
line to conserve air.
4. Remove mounting plate and retain screws.
70
40 50 60 70 80 90
C2313
Fig. 1. Johnson Thermostat.
Remove Robertshaw Thermostat
1. Turn cover screw on bottom clockwise to remove
cover.
2. Remove mounting screws and remove thermostat
from mounting plate. (Do not remove mounting
plate.)
3. Cut tubes near fitting and temporarily plug main
line to conserve air.
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85- 0210EF- 1
