Robertshaw 400-420 specifications Specifications, Ordering Data

MECHANICAL WALL THERMOSTATS

400/405 SERIES HEATING AND COOLING THERMOSTATS

400/405 Series thermostats are mercury free and environmentally safe. Their unique hermetically sealed-in-glass switch design requires no leveling and provides optimum protection from contamination.

The basic 400/405 thermostat can be used as a heating only, cooling only, or zone system thermostat, depending upon how the subbase is wired. The 400/405 Series thermostats, when used with the 490/495 Series Universal Switching Subbase, will replace most heating/cooling applications. Decorative Wall Plate is included with all models. It can be used to cover old thermostat mounting marks.

SPECIFICATIONS

Electrical rating	24 Volt, 30 VAC, 1.5 amp. max
Switch (SPDT) Heating	opens on temperature rise
Cooling	closes on temperature rise
Adjustable heat anticipation	.18 to 1.0 amp. std.
Fixed cooling anticipation	4700 ohms std.
Setting range	48 to 86°F
Thermometer range	44 to 96°F
Differential	2°F(nominal)
Dimensions	3-1/4" rounded square, 1-1/2" deep
	with subbase 3-5/8" high

400-420

490-400/

495-400

MERCURY FREE. ENVIRONMENTALLY SAFE.

ORDERING DATA

		DIAL			HEAT
UNI-LINE	FACTORY	TEMP.	SWITCH		ANTICIPATION
ORDER NO.	NUMBER	RANGE	ACTION	APPLICATION	RANGE	COMMENTS
400-400	34-074-150	48 TO		24 VOLT HEAT/COOL	.18 TO 1.0 AMPS	NO SUBBASE INCLUDED
		86°F
400-402	34-584-150		SPDT	ELECTRIC HEAT/COOL	.5 TO 1.5 AMPS	NO SUBBASE INCLUDED
400-403	34-464-159	39 TO 75°F		24 VOLT HEAT/COOL	.18 TO 1.0 AMPS	LO-TEMP DIAL RANGE
400-404	34-703-524	48 TO 86°F		ELECTRIC HEAT/COOL	2.0 AMPS (FIXED)	NO SUBBASE INCLUDED
400-420†	34-467-750			UNIVERSAL HEATING/	.18 TO 1.0 AMPS
		48 TO 86°F	SPDT			INCLUDES 490-400
400-421 ■	34-587-750			COOLING REPLACEMENT	.5 TO 1.5 AMPS	UNIVERSAL SUBBASE
DESIGNER WHITE MODELS
405-420•	34-959-5B2	48 TO	SPDT	UNIVERSAL HEATING/	.18 TO 1.0 AMPS	INCLUDES 495-400
405-421★	34-969-5B2	86°F		COOLING REPLACEMENT	.5 TO 1.5 AMPS	UNIVERSAL SUBBASE

•Also available in multiples of 100. Order 405-42K (bulk pack, no wall plate).

† Also available in multiples of 100. Order 400-42K (bulk pack, no wall plate).

■Also available in multiples of 100. Order 400-42A (bulk pack, no wall plate). ★ Also available in multiples of 100. Order 405-42A (bulk pack, no wall plate).

REPLACEMENT SUBBASES

ORDERING DATA

		SYSTEM	FAN
UNI-LINE	FACTORY	SWITCH	SWITCH
ORDER NO.	NUMBER	FUNCTIONS	FUNCTIONS	APPLICATION	COMMENTS
490-400†	SB-4A-5AJ	HEAT-OFF-COOL	AUTO-ON	UNIVERSAL	FIELD ADAPTABLE WIRING ALLOWS
					CONVERSION TO MOST APPLICATIONS
490-416*	SB-4A-11A	HEAT-OFF-COOL	AUTO-ON	GAS OR ELECTRIC	HEATING FAN RELAY REQUIRED
				HEAT/COOL	SEPARATELY
490-421*	SB-4A-12	HEAT-OFF-COOL	AUTO-ON		EXACT REPLACEMENT FOR BRYANT,
				HEAT/COOL	DAY/NIGHT & PAYNE P/N 34427D034
490-422	SB-4D-1	HEAT-COOL	—		EXACT REPLACEMENT FOR
					TROL-A-TEMP SB-1 (400-002-016)
DESIGNER WHITE MODELS
495-400	SB-4A-5AJ	HEAT-OFF-COOL	AUTO-ON	UNIVERSAL	FIELD ADAPTABLE WIRING ALLOWS
					CONVERSION TO MOST APPLICATIONS
† Will also replace Carrier P/N HH93Y2094 * No longer a stock item - 100 lot purchase required.
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