Robertshaw 9725i2 Addendum

110-1199 11/15/06 1:30 PM
A. The Operational Mode Chart below supersedes the chart in the Quick Start Installation Manual:
HVAC
Mode
is Emer
Outdoor
Temp.
1st Stage
(2nd is na)
< Low
E/W1
balance
Between
balance E/W1
points
No
E/W1
sensor 3
> High
E/W1
balance
1. 2nd and 3rd stages are used for heating only when the outdoor temperature is between the two balance points.
2. Standard and Add-On apply when the 2nd stage is on. Y1 is on for Standard. Y1 is not available for Add-On.
3. When no sensor is present, the thermostat behaves as if the outdoor temperature is always between the balance points.
4. Heat Pump Only applies to the 9725i2 when it is configured as Heat Pump in both 1st and 2nd stage.
B. Information on 3rd stage configuration settings given below is an addition to the comfort settings printed on page 15 of the
User's Manual:
3rd Stage Differential is the number of degrees away from 2nd stage activation that the thermostat allows before 3rd stage
equipment is activated. (Temperature demand overrides the 3rd Stage Delay.)
This feature is available only on the 9725i2 models with 1st stage heat equipment set to Heat Pump.
3rd Stage Delay is a timed delay between 5 and 40 minutes. It is the maximum time 2nd stage equipment tries to satisfy demand
before the third stage equipment is activated.
This feature is available only on the 9725i2 models with 1st stage heat equipment set to Heat Pump.
C. Information on 3rd stage setup given below is an addition to the system settings printed on page 19 of the User's Manual:
Equipment Setup On the 9725i2 models with 1st Stage Heat configured as Heat Pump, choose 3rd Stage Heat.
Choices are: None, Furnace, and Strip.
Page 1
ADDENDUM
This product is capable of up to 3 Heat / 2 Cool staging
in heat pump mode.
2nd Stage is a Furnace
Standard 2 Add-On
1st 2nd 3rd 1st
W2 na 1 na 1 W2
Y1 + Y1 + W2
Y1 Y1
W2 2 + E/W1 2
Y1 + Y1 + W2
Y1 Y1
W2 2 + E/W1 2
Y1 na 1 na 1 Y1
9725 2
i
2nd Stage is Strip
2
2nd 3rd 1st 2nd
na 1 na 1 W2 na 1
W2 + Y1 + W2
W2 2 Y1 Y1 + W2
E/W1 2 + E/W1
W2 + Y1 + W2
W2 Y1 Y1 + W2
2
E/W1 2 + E/W1
na 1 na 1 Y1 na 1
DELUXE
PROGRAMMABLE
THERMOSTAT
2nd Stage is a Heat Pump
Heat Pump Only 4
3rd 1st 2nd 3rd
na 1 E/W1 na 1 na 1
Y1 +
Y1 Y1 + W2 W2 +
E/W1
Y1 +
Y1 Y1 + W2 W2 +
E/W1
na 1 Y1 na 1 na 1
110-1199