Honeywell R8182F ユーザーズマニュアル

13

68-0105—2

The burner and circulator operate whenever the thermostat 

calls for heat. Relay 2K pulls in. When the cadmium sulfide 

flame detector sees flame, the safety switch heater circuit is 

bypassed, and 2K is held in through 2K1. If temperature rises 

to a high limit setpoint, R to B breaks, shutting off the burner. 

The circulator continues operation under direction of the 

thermostat. See Fig. 15, 16, 17 and 19.

In all multizone applications, a call for heat in any zone 

energizes the safety switch circuit and relay 2K pulls in. If the 

burner ignites within the safety switch timing, the cadmium 

sulfide flame detector sees flame and the safety switch heater 

is bypassed.

In all multizone applications with R8182D and H, the low limit 

control in the Aquastat® limit acts independently to turn on the 

main burner on a drop in water temperature. When R to B (low 

limit) is made, relay 2K pulls in to turn on the main burner, the 

same as for single-zone application.

The relay for each zone is connected to the Aquastat® limit 

through terminals ZC and ZR. The R845 Relay and 

thermostat for each zone can energize the zone circulator 

through ZC only if R to W in the Aquastat® limit is made. If 

R to B (high limit) is made, the zone thermostat energizes the 

burner through ZR.

The relay for each zone is connected to the Aquastat® limit 

through terminals ZC and ZR. The R845A Relay and 

thermostat in each zone can energize the zone circulator 

through ZC on a call for heat. If R to B (high limit) is made, the 

zone thermostat energizes the burner through ZR.

The valve for each zone is connected to the Aquastat® limit 

by wiring end switches on the zone valve to T-T on the R8182. 

On a call for heat from any zone, the R8182 operates the 

same as for single zone applications.

Fig. 18. R8182D,H Aquastat® limit switching.

LOW LIMIT 
AND 
CIRCULATOR
SETTING

HIGH LIMIT
SETTING

SWITCH BREAKS ON 
TEMPERATURE RISE. 
BURNER TURNS OFF. 
CIRCULATOR OPERATES 
ON A CALL FOR HEAT.

SWITCH MAKES ON 
TEMPERATURE FALL.
BURNER OPERATES ON A 
CALL FOR HEAT.

SWITCH MAKES R-W 
AND BREAKS R-B ON 
TEMPERATURE RISE.

SWITCH MAKES R-B AND 
BREAKS R-W ON 
TEMPERATURE FALL. 
BURNER IS ON TO 
MAINTAIN MINIMUM 
WATER TEMPERATURE. 
CIRCULATOR IS OFF.

M1523

SWITCH MAKES R-W 
AND BREAKS R-B ON 
TEMPERATURE RISE.

WHEN WATER REACHES PROPER TEMPERATURE, THE BURNER 
SHUTS OFF OR THE CIRCULATOR PUMP STARTS (WHEN CALLING 
FOR HEAT).

1

1

R-B MAKES ON 
TEMPERATURE FALL.
BURNER AND 
CIRCULATOR OPERATE 
ON A CALL FOR HEAT.

°

°

°

°

M1510

R-B BREAKS ON
TEMPERATURE RISE.
BURNER TURNS OFF.
CIRCULATOR OPERATES
ON A CALL FOR HEAT.

HIGH LIMIT
SETTING

15

°

F  (8

°

C)

DIFFERENTIAL