HTP 850 LPHL - Manual (Page 50)

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LP- 205 REV. 3.28.14
4. Verify electrical connections are correct and securely attached.
5. Inspect intake piping and exhaust piping for signs of deterioration from corrosion, physical damage or sagging. Verify intake piping
and exhaust piping are intact and correctly installed per Venting Section and local code.
I. CASCADE SYSTEM
If the boiler is used in a stand-alone configuration, skip this section.
Programming the Master Boiler:
1. Make sure there is no demand for heat. The boiler cannot be programmed if there is a demand for heat.
2. Apply power to the boiler.
3. Enter the Installer Menu following instructions in Part 11 of this manual.
4. Verify that parameter 15 is set to 0. This makes the master boiler address 0. NOTE: The master boiler MUST be addressed as 0.
5. Change parameter 23 from 0 to 1. This makes it the master boiler.
6. Exit the installer menu.
NOTE: The temperature set point of the master boiler must match the follower boiler set point in order for the system to operate
properly.
Follower Boilers:
READ THE NOTES BELOW BEFORE PROGRAMMING FOLLOWER BOILERS

The boiler addressed as 1 will share its alarm output with the master boiler.

If one of the follower boilers has an indirect fired water heater connected to it, the address of this boiler must be 2 or greater.

It is recommended but not necessary to address boilers in the order that they are wired.

No two boilers can have the same address.

It is not required to use all consecutive address numbers. For example, in a 2 boiler with an indirect connected to the follower,
the follower address would be 2 (address 1 not used).
1. Make sure there is no demand for heat. Boilers cannot be programmed if there is a demand for heat.
2. Apply power to the follower boiler you are working on.
3. Enter the installer menu following instructions in Part 10 of this manual.
4. Set parameter 15 to 1 for the first follower, 2 for the second follower, etc., depending on the boiler you are programming.
5. Verify that parameter 23 is set to 0. This makes the boiler a follower.
6. Exit the installer menu.
NOTE: The temperature set point of the follower must match the master boiler set point in order for the system to operate properly.