Tjernlund DJ-3, D-3, HD, I, IL, XL Draft Inducer 8504003 Rev A 07/00 - Manual (Page 10)

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DRAFT INDUCER CONNECTED WITH UP TO 4 OIL FIRED BURNERS WITH THE MAC-4 AND A 950-1067 POST-PURGE
RELAY/TIMER (VENTER MOTOR LESS THAN 4.4 AMPS) MODELS I, IL, XL MUST USE 950-0483 ISOLATION RELAY
COMPONENTS NEEDED:
(1) DRAFT INDUCER
(1) PS1505 FAN PROVER
(1) 950-1067 RELAY/TIMER
MAXIMUM AMP LOAD IS
4.4 AMPS
OPERATION CIRCUIT CHECK
1. After all appliance wiring is complete, establish 115V power to the appliance and Draft Inducer with the appliance thermostat /
aquastat not calling for heat. NOTE: If using a post-purge Relay/Timer, the Draft Inducer may operate when power is first estab-
lished. Wait until the Draft Inducer shuts off before continuing.
2. Adjust the appliance thermostat/aquastat to call for heat. At this point, the Draft Inducer should start. After a slight delay, (up to 4
seconds), the appliance burner should fire after the PS1505 Fan Proving Switch proves draft. The delay is caused by the PS1505
Fan Proving Switch. If you are unable to detect a slight delay, contact Tjernlund Products, Inc. at 1-800-255-4208 for assistance.
DO NOT OPERATE THE APPLIANCE WITHOUT THE PS1505 PROVING SWITCH WIRED INTO THE THE EQUIPMENT CIRCUIT!
MULTIPLE DRAFT INDUCERS, POWER VENTERS OR IN-FORCERS CONNECTED WITH UP TO 4 115V OIL FIRED BURNERS
(IF INDIVIDUAL OR COMBINED MOTOR LOAD IS OVER 1 H.P. ISOLATION RELAY(S) WILL HAVE TO BE ADDED)
IF DRAFT INDUCER MOTOR IS OVER 4.4
AMPS, WIRE 950-0483 ISOLATION RELAY
AS SHOWN IN THIS DIAGRAM.
COMPONENTS NEEDED:
(1) MAC-4 APPLIANCE CONTROL
DRAFT INDUCER(S)
PS1505 FAN PROVER(S)
MOTOR ISOLATION RELAY /
CONTACTOR(S) IF OVER 1 H.P.
NOTE: The MAC-4 is used for
wiring up to 4 heating appliances
with Draft Inducers, Power Venters
or IN-FORCERs. It is suitable for
any combination of 24 VAC and
115 VAC control systems for gas
and oil burners. Wire Fan
Prover(s) or Limit(s) in Series with
Prover terminal block. Do not sup-
ply voltage to Prover terminal
block!