Field Controls S2000 Control Wiring Solutions for Various Hvac Systems, 00.3 OHM

CONTROL WIRING SOLUTIONS FOR VARIOUS HVAC SYSTEMS

Additional diagram shown on page 7.

FIG. 6		Heat Only System and
		Steam Humidifier with standard
		dry contact HumidistatS2000 & S2020 Humidifier
Heat only		Low Voltage Terminal Block
Thermostat		G1 R G2 H	H	A	A
R	W
				Factory
				Jumper will
				stay in place
				unless a field
				installed Air
R	W G			Proving Device
		Dry Contact		is used.
Typi ca l
Furnace		Humidistat
		062000 Humidistat

FIG. 8	Bryant/Carrier Evolution/Infinity	NOTE: An APD or similar device
		Wire the APD in series with the HH
		must be used in this application.
	Variable Speed Heat/Cool System	circuit.

FIG. 7	Conventional Heat & Cool System
	and Steam Humidifier with 072000

Typical Thermostat	S2000 & S2020 Humidifier
	Low Voltage Terminal Block			A
R W G Y C	G1 R G2 H	H	A
			REMOVE
			FACTORY
			JUMPER
R W G Y C			Model APD or
Typical Furnace
			Equivalent

TemperatureOutdoor OD OD C R H H

Sensor 072000 Humidistat

Refer to the 072000 Technical Bulletin

FIG. 9 Heat Pump System and Steam Humidifier

Bryant				Program Evolution
				T-stat as follows:
Evolution				1.Heating airflow
Thermostat			D	To Efficiency mode.
A	B	C		2.Humidifer
				installed=Yes
				3.Humidify with
				Fan=Yes
				4. Set FAN to
				Continuous Mode &
				select MEDIUM
				speed.
				HUM
A	B	C	D
Bryant Evolution
	Furnace

2 4 v a c Common

S2000 & S2020 Humidifier

Low Voltage Terminal Block

G1	R G2	H	H	A	A
DO NOT USE				Leave Factory
				Jumper in Place
	SPST Dry Contact
	Isolating Relay
	with 24vac Coil

Model APD or

Equivalent

with 072000 Humidistat
		S2000 & S2020 Humidifier
Typical Heat Pump		Low Voltage Terminal Block
Thermostat		G1 R G2	H H	A	A
O R W2 G Y C
				REMOVE
				FACTORY
				JUMPER
O R W2 G Y	C			Model APD or
Typical Air Handler
	Outdoor	OD OD C R	H H	Equivalent
Outdoor Heat Pump	Temperature
	Sensor
not shown for clarity		072000 Humidistat

FIG. 10	Heat Pump System and Steam Humidifier with
	Combo Thermostat/Humidistat
	and Isolating Relay

Thermostat with built-in		S2000 & S2020 Humidifier
		Low Voltage Terminal Block
Humidification Control		G1 R G2 H	H	A	A
O R W2 G Y C H
				REMOVE
				FACTORY
				JUMPER
O R W2 G	Y C	SPST Dry Contact
		Isolating Relay
		with 24vac Coil		Model APD or
Typical Air Handler
				Equivalent

Outdoor Heat Pump not shown for clarity

FIG. 11	S2000 & S2020 Humidifier	Disconnect the wires from the “A”
		terminals and check the device & circuit
	Low Voltage Terminal Block	with a reliable ohm meter. Check continuity
	G1 R G2 H H A A	when the fan is off and when it is running.

00.3OHM	Model APD current
	sensing switch or
	equivalent air proving
	device. Dry Contacts Close
	when fan is running!

Refer to the 072000 Technical Bulletin

The latest improvement to the Field Controls humidifiers is the new “Airflow Interlock Feature” provided on the low voltage terminal blower on the HVAC system does not operate when called block. Due to popular demand we have made it easier for you to achieve fail safe lockout in the event the fan or blower on the HVAC system does not operate when called upon. A high humidity or airflow proving device is necessary.

You must still determine the type of proving device you want to use. We recommend our new Model APD switch. But then all you have to do is connect two low voltage wires from your air proving device straight to the Steam Humidifier’s “A” terminals. No additional field relays or components are needed.

operating the blower on the HVAC system. If the Steam Humidifier detects a loss of airflow longer than 1 minute, it will The Steam Humidifier monitors the airflow circuit anytime it is shutdown the heating element and stop producing steam to operating the blower on the HVAC system. If the Steam Humidifier detects a loss of airflow longer than 1 minute, it will shutdown the heating element and stop producing eam to avoid saturating the duct.

You must test the air proving device when you install it to make sure it will function properly. WARNING: DO NOT perform this test with the wires connected to the Steam Humidifier. Temporarily disconnectacross thethemnormally. Referopento Figurecontacts11.with the fan/blower running.

fan/blower is running.

1.After installing the air proving device, test for continuity across the normally open contacts with the fan/blower off. You should read infinity (no continuity) when the fan/blower is off.

2.Turn on the fan/blower at the thermostat and test for continuity across the normally open contacts with the fan/blower running. You should now read continuity (a complete circuit) when the fan/blower is running.

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