Testing The Control Wiring - Bosch Heatronic 4000 Installation & Operating Instructions Manual

Testing the Power

If the control display does not turn on, check the Power In L & N terminals (83 & 84) using an electrical multimeter. The voltage

should measure between 103.5 to 126.5 V (ac).

User Test (HAND)

The User Test (HAND mode) is one of the Manual

Override modes of the control. Refer to the Hand

mode for a description of the steps that are included

Manual

to operate the outputs. The steps are dependent

Override

how the boiler(s) (Source # Menu) & the system

(Setup menu) are configured.

Testing the Auxiliary Relay ---------- -------- ------ ------

Activate the HAND mode within the Manual Override. Select the

Auxiliary item & set it to ON. Using an electrical meter, measure

for continuity between the Auxiliary terminals (43 & 44).

Testing the Alert Dry Relay ------------------------------

Activate the HAND mode within the Manual Override. Select

the Alert item & set it to ON. Using an electrical meter, measure

for continuity between the Alert Dry terminals (45 & 46).

Testing the Primary Pumps ----------------------- -------

Activate the HAND mode within the Manual Override.

For primary pump 1, select the Primary Pump item & set it

to PMP1. Using an electrical meter, measure for continuity

between the Primary Pump 1 terminals (47 & 48).

For primary pump 2, select the Primary Pump item & set it

to PMP2. Using an electrical meter, measure for continuity

between the Primary Pump 2 terminals (49 & 50).

Testing the DHW Tank Pump ------------- -------- -------

Activate the HAND mode within the Manual Override. Select

the DHW Pump item & set it to ON. Using an electrical

meter, measure for continuity between the DHW Tank Pump

terminals (85 & 86).

Testing the Boiler Pump(s)

Activate the HAND mode within the Manual Override. Select

the Boil 1 PUMP item & set it to ON. Using an electrical meter,

measure for continuity between the Boiler 1 Pump terminals

(75 & 76). Repeat the steps above for Boiler Pumps 2, 3 & 4.

Testing the Central Heat (CH) Call

Set the Application Mode to RSET. Remove all wires from

the CH Call terminals (5 & 6). The control display should

show no Heat Call. Reconnect wires. Then apply either a

Testing the DHW Tank Call

Set the Application Mode to either RSET, SETP or EMS.

Remove all wires from the DHW Tank Call terminals (7 & 8).

The control display should show no DHW Call. Reconnect

Testing the Fuel Switch

Set the Application Mode to either RSET, SETP or EMS.

Remove all wires from the Fuel Switch terminals (9 & 10).

The control display should show no F SW. Reconnect wires.

Heatronic 4000

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Testing the Boiler Stage(s) --- --- ------ --- --- --- --- --- ----

T hi s test applies for single stage & two stage boilers only.

Activate the HAND mode within the Manual Override. For a

single stage boiler, select the Boil STG item & set it to 1.

Using an electrical meter, measure for continuity between the

Boiler 1 Stage 1 terminals (53 & 54).

For a two stage boiler, select the Boil STG item & set it to 1.

Using an electrical meter, measure for continuity between the

Boiler 1 Stage 1 terminals (53 & 54). Set the Boil STG item to 2.

Using an electrical meter, measure for continuity between the

Boiler 1 Stage 2 terminal (55 & 56). Repeat the steps above,

as applicable, for Boilers 2, 3 & 4.

Testing the Modulating Boiler Output - --- --- - --- --- --- --

This test applies for modulating boilers only.

Activate the HAND mode within the Manual Override.

Select the Boil 1 MOD item & set a desired firing rate. Using

an electrical meter, measure for either a V (dc) or mA signal

between the Boiler + Mod - terminals (51 & 52). The reading

should be between 0 V (dc) & 10 V (dc) or 4 mA & 20 mA.

Repeat the steps above for Boilers 2, 3 & 4.

Testing the Temperature Boiler Output - --- ----- --- ---- - -

This test applies for EMS boilers only. Activate the HAND

mode within the Manual Override.

Select the Boil 1 TEMP item & set a desired temperature

between 50 & 210°F (10 & 99°C). Using an electrical

meter, measure for a V (dc) signal between the Boiler +

Mod - terminals (51 & 52). The reading should be between

0 V (dc) & 10 V (dc). Repeat the steps above, as applicable,

for Boilers 2, 3 & 4.

short circuit or 24 V (ac) over the CH Call terminals. The

control should now show a Heat Call.

wires. Then apply either a short circuit or 24 V (ac) over the

DHW Tank Call terminals. The control should now show a

DHW Call.

Then apply either a short circuit or 24 V (ac) over the Fuel

Switch terminals. The control should now show a F SW.

30 of 60

Terminals 83 & 84

Manual Override Button

--- --- --- --- --- --- --- --- --- ----

-- --- --- --- --- --- --

- --- -- - ---- --- --- -

Terminals 5 & 6

Terminals 7 & 8

Terminals 9 & 10

BTC461503101C | 6720810369 (2018/03)