R845A hook-up


  #1  
Old 09-22-07, 05:44 AM
F
Member
Thread Starter
Join Date: Sep 2007
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Question R845A hook-up

I just installed a new hydronic zone upstairs with separate taco circulator. I've followed the diagram for hooking up a honeywell R845A and can get circulator to work but boiler won't start. Any help would be appreciated.
Thanks
 
  #2  
Old 09-22-07, 09:16 AM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,401
Received 38 Likes on 36 Posts
R845a

It would help to know what aquastat is on the boiler, if the boiler stays hot for domestic or is it cold start, & is the boiler gas or oil fired.
 
  #3  
Old 09-23-07, 03:56 PM
F
Member
Thread Starter
Join Date: Sep 2007
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
The aquastat is a Honeywell L8151A. I hooked up according to schematic I got off of Honeywell website.
 
  #4  
Old 09-23-07, 07:19 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,401
Received 38 Likes on 36 Posts
L8151a

Sorry, I can't find anything on that aquastat on Honeywell's site. Does this boiler stay hot for domestic hot water? Is the thermostat for the first zone 120 or 24 volts?
 
  #5  
Old 09-24-07, 05:10 AM
F
Member
Thread Starter
Join Date: Sep 2007
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
R845a

Furnace stays hot for domestic hot water. I think the thermostat is 24 volt. Oil fired furnace.
thanks
 
  #6  
Old 09-24-07, 04:30 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,538
Likes: 0
Received 8 Likes on 6 Posts
I found the 8151 here Grady:

customer.honeywell.com/request.cfm?form=60-2553

Triple a'stats confuse me ...
 
  #7  
Old 09-24-07, 06:39 PM
Grady's Avatar
Forum Topic Moderator
Join Date: Jan 2005
Location: Delaware, The First State
Posts: 14,401
Received 38 Likes on 36 Posts
Wiring

Thanks Trooper. I've been having trouble with Honeywell's site for a few days now.

FilthyBill: If you used the wiring diagram on page 5 of the document to which Trooper linked, make sure water is actually circulating. It is quite common to have an air block after opening the system. Purge it well & try again. A tip off to not circulating is the boiler temp does not drop when the circulator runs or the return pipe does not get hot.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: