Tjernlund MAC4E User Manual

MAC4E OPERATION

The MAC4E is used in conjunction with the UC1 Universal Control to interlock up to four additional 24 VAC, 115 VAC or millivolt (Dry Contact)
controlled appliances. It activates the Venter through its connections to the UC1 and in turn relies on the UC1 Fan Prover safety circuit (P1 & P2)
to allow its interlocked appliances to operate. Any pre/post-purge settings on the UC1 will be defaulted to the MAC4E. Two LEDs for each appli­ance interlock block are provided on the MAC4E. LEDs #1, 3, 5, 7 (AMBER) show an appliance call for heat. LEDs #2, 4, 6, 8 (BLUE) show that
the burner is approved to fire after the Venter Fan Prover safety circuit (P1 & P2) through the UC1 is completed. The MAC4E also has an
LED #9 (RED) which means power is supplied to the MAC4E through the UC1.

MILLIVOLT INSTALLATIONS

Each millivolt appliance interlocked with the MAC4E must have its own WHKE kit installed. The WHKE Gas Pressure Switch actuates the Venter
through the A - B Dry contacts. The Linear Limit switch disables the heater in the event of a venting malfunction. IMPORTANT: Each millivolt
appliance interlocked with the MAC4E must have its own Linear Limit spill switch.

MAC4E MOUNTING

Do not mount the MAC4E junction box on a heat source that exceeds 104oF (40oC). Examples of improper mounting surfaces include vent pipe,
top of appliance casing or any place where radiant or convective heat would cause the junction box temperature to exceed 104oF.

The MAC4E is intended for indoor installation only.

The MAC4E has a 2 foot whip that contains 1 ground, 2 power and 3 communication leads. Mount MAC4E adjacent to UC1 control.

Using the key hole slots on the back of the MAC4E junction box as a template, mark 4 holes on the mounting surface, drill pilot holes if neces­sary, and secure junction box using provided screws.

MAC4E SAFETY INTERLOCK TEST

PERFORM THE FOLLOWING INTERLOCK TEST AFTER CONNECTING MAC4E(S) TO UC1 AND INTERLOCKING ALL BURNERS

1. Confirm power is supplied to MAC4E control(s) from the UC1. MAC4E Power LED #9 (RED) should be on.

2. Initiate an appliance call for heat. MAC4E LED #1, 3, 5, or 7 (AMBER) should be on indicating an appliance call for heat.

3. If the UC1, P1 & P2 Prover safety circuit is closed, indicating an approved condition, the appliance interlock relay will close making
terminal #3 closed to terminal #4. MAC4E LED #2, 4, 6, or 8 (BLUE) show that the burner is approved to fire. Fire all appliances
to make sure each burner fires properly.

4. Remove power to the UC1 and any interlocked appliances. The Power LED (RED) on UC1 or any LED’s on UC1 or MAC4E
should not be on. Test the safety circuit by removing either lead from Fan Prover switch connected to UC1 P1 and P2 Fan Prover
safety circuit. Do not let the opened Lead touch a ground or damage may occur to the control when power is reestablished.
Reestablish power to the UC1 and interlocked appliances and initiate a call for heat. After 60 seconds a Prover Start Up fault
should arise with UC1 LED #4 (RED) flashing 3 times.

5. Remove appliance call for heat and power to the UC1 and any interlocked appliances. The Power LED (RED) on UC1 or any
LED’s on UC1 or MAC4E should not be on. Reconnect Fan Prover switch lead removed in step 4.

6. Reestablish power to UC1 and interlocked appliances and initiate a call for heat from each appliance to confirm proper operation of
UC1, MAC4E and appliances.

7. Perform Draft Adjustment and Combustion air safety check as outlined in Venter/Inducer installation manual.

IMPORTANT: DO NOT OPERATE AN APPLIANCE THAT OPERATES WITH THE PROVER SAFETY CIRCUIT DISCONNECTED!

RESETTING FAULT CODE CREATED BY STEP 4 OF SAFETY INTERLOCK TEST

IMPORTANT: Prior to accessing the fault code memory, note the settings of the UC1 dip switches so that they can be returned to their original

Pre / Post-Purge positions. When power is supplied to the UC1 use caution when moving dip switches.

The last fault code can be retrieved at any time by setting all dip switches 1-8 to the up, or “on” position. The last fault code, or lack there of, will
be indicated by counting the number of times LED 4 flashes. By moving any of the dip switches back to their original position, the fault code will
be cleared. NOTE: The UC1 board must have its 115 VAC power supply present when any of the (1-8) dip switches are moved back to their
original position for the fault code to clear.

TJERNLUND PRODUCTS, INC.

1601 Ninth Street • White Bear Lake, MN 55110-6794
PHONE [phone] • [phone] • FAX [phone]
Visit our web site • www.tjernlund.com

Copyright © 2005, Tjernlund Products, Inc. All rights reserved. P/N 8504112

Multiple heaters firing at the same time will result in varying volumes of flue gas and varying vent system draft pressures. Make sure all
heaters interlocked with the MAC4E operate within the normal draft range specified by the heater manufacturer. All heaters utilizing a fixed
speed Venter/Inducer must be equipped with a draft hood, draft diverter, or barometric draft control. Tjernlund ABD-Series Balancing Baffles
may be utilized for balancing draft on each heater.

MAC4E

BOARD

VERSION F

REV. B 08/05

C24VDRY3

AMBER

LED7

D115VD24VDRY4

K2

INTERLOCK

RELAY

K3

K1

DRY2

RELAY

BLUE

APPLIANCE 2

LED3

AMBER

LED4

B115V B24V

N

G

G

R

E

E

CONDUIT

24" FLEX

AI

E

T

K

C

W

H

B

L

post-purge settings + safety circuit connections are in the Universal Control.

This device must be connected to a Tjernlund Universal Control. All pre &

Remove power to Universal Control and all connected appliances when

installing or servicing the MAC4E. Failure to do so may result in personal

WARNING:

NOTE:

UNIVERSAL CONTROL

BLUE

LED2

PRE-PURGE SETTINGS

OPEN PROVER OPTION

POST-PURGE SETTINGS

VENTER / INDUCER

1 H.P. MAX @ 115 VAC

MOTOR

N

G

E

E

R

TJERNLUND

INC.

PRODUCTS,

MTR

W

MN

LH

TC

EK

IA

B

K2

APPROVED

50/60 Hz

115 VAC

SUPPLY

R

DO NOT SUPPLY VOLTAGE

TO "A" OR "B".

GREEN

RED

RED

CALL

JUMPER

INTERLOCK

XN

XL

NO

J1

J2

COM

K1

RELAY

DRY

115V

24V

LED5 LED3LED4

Y

R

P/N 1303963B

D

E

AMBER

P2

(9)

(3 - 8)

F

8967

GND

(1 - 2)

14532

CONP1

L

O

G

R

A

E

T

I

V

PROVER

LED1

Burner circuit is energized with contact closure from terminal 3 to terminal 4.

Safety circuit through Universal Control P1 & P2 Fan Prover is verified "Open" upon start up.

Appliance call for heat.

LED STATUS INDICATOR LIGHTS

LED #2 (Blue)

LED #1 (Amber)

AS APPLIANCE INTERLOCK VOLTAGE.

RED JUMPER POSITION MUST BE THE SAME

IMPORTANT:

LED

POWER

RED

24 OR 115 VAC

APPROVED CALL BACK TO HEATER

INTERCEPTED C ALL COMMON OR NEUTRAL

24 OR 115 VAC INTERCEPTED CALL FOR HEAT

5 VDC BOARD-GENERATED POWER

DO NOT SUPPLY POWER!

115 VAC

LEGEND:

TERMINAL 2:

TERMINAL 1:

TERMINAL 4:

LED6

USER-PROVIDED

CALL SWITCH

"DRY"

OR

COMMON /

LINE / HOT

NEUTRAL

INTER-

HEAT

CALL FOR

CEPTED

properly positioned.

selection jumper

Each appliance

Universal Control.

interlocked with the

to each A - B, 1 - 4

its red voltage

MAC4E must have

terminal strip are

Appliance interlocks

the same as on the

MAC4E

injury and/or equipment damage. LED #9 (RED) on the MAC4E should

APPLIANCE 1

INTERLOCK

MAC4E CONTROL

not be on if power has been removed.

RELAY

INTERLOCK

APPLIANCE 3

BLUE

LED5

AMBER

LED6

C115V

OPTIONAL DAISY CHAIN CONNECTIONS

INTERLOCK

RELAY

R

R

APPLIANCE 4

BLUE
LED8

F

R

C2

CGND

Y

A

O

L

E

T

V

E

I

D

GREEN

VIOLET

F2 GNDNL

BLK

TO ADDITIONAL MAC4E

K4

POWER

LED9 - RED

DRY1

GRY

RED

BLUE

LED2

A115V A24V

L

N

AMBER

LED1

WHT

CONNECTIONS FROM MAC4E TO UC1 UNIVERSAL CONTROL

1. Connect Black from MAC4E whip to XL on UC1.

2. Connect White from MAC4E whip to XN on UC1.

3. Connect Green from MAC4E whip to ground screw in UC1.

4. Connect Gray from MAC4E whip to GND on UC1.

5. Connect Red from MAC4E whip to F on UC1.

6. Connect Violet from MAC4E whip to C on UC1.

DAISY CHAIN CONNECTIONS FOR MULTIPLE MAC4E’S CONNECTED TOGETHER

IMPORTANT: VENTING MULTIPLE HEATERS WITH A SINGLE FIXED SPEED VENTER /

INDUCER MAY REQUIRE TJERNLUND ABD-SERIES BALANCING BAFFLES. FOR INSTAL-

LATIONS REQUIRING MORE THAN ONE MAC4E INTERLOCK, WE RECOMMEND THAT

OUR TECH SERVICE DEPT. BE CONTACTED AT 1-800-255-4208.

1. Connect White from second MAC4E whip to N on MAC4E connected to UC1.

2. Connect Black from second MAC4E whip to L on MAC4E connected to UC1.

3. Connect Green from second MAC4E whip to ground screw in MAC4E connected to UC1.

4. Connect Red from second MAC4E whip to F2 on MAC4E connected to UC1.

5. Connect Gray from second MAC4E whip to GND on MAC4E connected to UC1.

6. Connect Violet from second MAC4E whip to C2 on MAC4E connected to UC1.

TO 2ND MAC4E WHIP

MAC4E WIRING CONNECTIONS WITH UC1 UNIVERSAL CONTROL

Remove power to UC1 and heating equipment when making connections from the MAC4E to the UC1 or installing, servicing or changing dip switch settings in the UC1.

Failure to do so may result in personal injury and/or equipment damage.

The Power LED (RED) on UC1 or any LED’s on UC1 or MAC4E should not be on.

See UC1 Universal Control wiring section of Venter or UC1 instructions for 24 VAC, 115 VAC or Millivolt (Dry Contact)

appliance interlock diagrams. The MAC4E and UC1 Universal Control appliance interlock steps and diagrams are identical.

IMPORTANT: Venter Fan Prover must be wired to P1 & P2 safety circuit in UC1. Do not

supply power to P1 & P2 or damage will result. The MAC4E contains four appliance

interlock blocks which are identical. Each appliance interlocked with the MAC4E and UC1 must have the Red voltage jumper on the proper 115V, 24V or DRY position based

on appliance interlock voltage.