York D2EG 048 Disconnect Switch Bracket for Units, With Optional BELT-DRIVE Bracket, Pipe Sizing

035-14832-003-A-0204

COOLING / HEATING (24 VOLT THERMOSTAT)

COOLING/HEATING(24VOLTTHERMOSTAT)

THERMOSTAT1

TERMINALS

	UNITTERMINAL
RH	STRIPTB1
ADD
JUMPER RC	R
Y	Y1	24VOLT

TRANSFORMER

Y2

WW1

W2

GG

B

124VOLTTHERMOSTAT2TH07701024.IFTHEUNITHASANECONOMIZER, REMOVEJUMPERJ1FROMTERMINALS8AND10ONTHERELAYBOARD TOPREVENTSIMULTANEOUSOPERATIONOFTHECOMPRESSORAND THEECONOMIZER.IFYOUWANTTOCONTROLTHERECONOMIZERONA SECONDSTAGEOFCOOLINGORHAVEANDELECTRICHEATACCESSORY WITHTWOSTAGESOFHEAT,USETHERMOSTAT2TH0471024

COOLING/HEATING(ELECTRONICTHERMOSTAT)

SINGLESTAGE

THERMOSTAT1

TERMINALS UNITTERMINAL

RH STRIPTB1

	RC	R
ADD
	Y	Y1
JUMPER
	W	W1
	G	G
		B

24VOLT

TRANSFORMER

1ELECTRONICPROGRAMMABLETHERMOSTAT2ET07701024(INCLUDESSUBBASE).

IFTHISUNITHASANDECONOMIZER,REMOVEJUMPERJ1FROMTERMINALS8AND 10ONTHERELAYBOARDTOPREVENTSIMULTANEOUSOPERATIONOFTHE COMPRESSORANDTHEECONOMIZER.IFYOUWANTTOCONTROLTHE ECONOMIZERONASECONDSTAGEOFCOOLING,USETHERMOSTAT2ET04700224.

REFER TO THE ELECTRICAL

DATA TO SIZE THE DISCONNECT

SWITCH, THE WIRING AND THE

OVERCURRENT PROTECTION

CONTROL WIRING

COOLING / HEATING (ELECTRONIC THERMOSTAT)

THERMOSTAT1
TERMINALS				UNITTERMINAL
	RC			STRIPTB1	24VOLT
ADD
	RH			R	TRANSFORMER
JUMPER
	Y1			Y1
	Y2	2	2	Y2
	W1			W1
4	W2		3	W2
	G			G
	B			B
	LED1			X
	LED2	NOT		N
	COM	USED 4
ADD	A1	3
JUMPER	A2

T TOREMOTESENSOR

T 2TH040702224IFUSED

1ELECTRONICPROGRAMMABLETHERMOSTAT2ET04700224(INCLUDESSUBBASE)

2SECONDSTAGECOOLINGISNOTREQUIREDONUNITSLESSECONOMIZER.

3SECONDSTAGEHEATINGISONLYREQUIREDONUNITSWITHATWOSTAGE ELECTRICHEATER.

4REMOVEJUMBERJ2FROMTERMINALS4AND9ONJUMPERPLUGCONNECTOR P6ONUNITSWITHECONMIZER.TERMINALSA1ANDA2PROVIDEARELAY OUT-PUTTOCLOSETHEOUTDOORECONOMIZERDAMPERSWHENTHE THERMOSTATSWITCHESTOTHESET-BACKPOSITION.

POWER WIRING

REFER TO THE ELECTRICAL

DATA TO SIZE THE DISCONNECT

SWITCH, THE WIRING AND THE

OVERCURRENT PROTECTION

FIG. 3 - TYPICAL FIELD WIRING

DISCONNECT SWITCH BRACKET FOR UNITS	The heating value of the gas may differ with locality. The value
WITH OPTIONAL BELT-DRIVE BRACKET	should be checked with the local gas utility.
A special bracket for mounting a field-supplied disconnect	NOTE: There may be a local gas utility requirement specifying
switch is provided in each unit ordered with an optional belt-		a minimum diameter for gas piping. All units require a
drive supply air blower. The bracket is shipped inside the		1/2 inch pipe connection at the entrance fitting.
blower compartment taped to the top of the blower housing.
Install the bracket on the left hand side of the unit as shown in	TABLE 3 - PIPE SIZING
Figure 9. Several existing screws at the top of the unit and one
approximately midway down from the top will be used for
mounting the bracket. Screws should be loosened only - NOT	Length in Feet			Nominal Iron Pipe Size
REMOVED. Mounting holes in the bracket have elongated			1/2 in.	3/4 in.	1 in.	1-1/4 in.
keyways allowing easy installation. Re-tighten screws after	10		132	278	520	1,050
bracket is in place to ensure panels will remain leak tight.	20		92	190	350	730
	30		73	152	285	590
GAS PIPING	40		63	130	245	500
	50		56	115	215	440
Proper sizing of gas piping depends on the cubic feet per hour	60		50	105	195	400
	70		46	96	180	370
of gas flow required, specific gravity of the gas and the length of	80		43	90	170	350
run. “National Fuel Gas Code” Z223.1 should be followed in all	90		40	84	160	320
	100		38	79	150	305
cases unless superseded by local codes or gas company
	Maximum capacity of pipe in cubic feet of gas per hour. (Based upon a pressure drop of 0.3 inch
requirements. Refer to Table 3.
	water column and 0.6 specific gravity gas).

Unitary Products Group 5