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Forums > Professional > RTI Control Systems
Aprilaire 8870 question
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Topic:
Aprilaire 8870 question
This thread has 8 replies. Displaying all posts.
Post 1 made on Thursday April 15, 2010 at 20:15
Jimmy Bellagio
Advanced Member
Joined:
Posts:		January 2008
854
I have a situation where I need to control 5-7 Aprilaire thermostats in a home and get 2-way freedback from each - is that possible? What is the maxumum amount of thermostats you can use per processor? How are they distinquished if more than one can be controlled?

Thanks
James S. Bellagio
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Post 2 made on Thursday April 15, 2010 at 20:24
ErikS
Active Member
Joined:
Posts:		July 2003
699
32 stats per RS232 port on the XP8. They are addressable so they can all wire to the same Aprilaire busline, I think the part is 8818.

One word of caution, they do not have schedules built in and the 2way driver doesn't support scheduling other than event macros that you program.
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Post 3 made on Thursday April 15, 2010 at 21:24
Avid67
Long Time Member
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Posts:		February 2008
118
Scheduling can be done through the XP-8. Set up an event on the processor and call up a macro for settings.
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OP | Post 4 made on Friday April 16, 2010 at 00:44
Jimmy Bellagio
Advanced Member
Joined:
Posts:		January 2008
854
Thank you guys - what pieces would I require for a system with 5 2-way controllable thermostats?

- x1 XP8
- x3 Zigbee Keypads
- x2 Zigbee Remotes
- x5 8870 Thermostats
- x1 8818 Busline

What am I missing? Is there anything else I need? Thanks.
James S. Bellagio
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Post 5 made on Friday April 16, 2010 at 01:14
rtiuser
Long Time Member
Joined:
Posts:		August 2009
99
You'll also need the 8811 RS-232 protocal adapter.
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Post 6 made on Friday April 16, 2010 at 11:03
drewski300
Super Member
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Posts:		January 2007
3,849
Also in the driver make sure you set the correct number of stats to be polled otherwise the feedback is really slow.
"Just when I thought you couldn't possibly be any dumber, you go and do something like this... and totally redeem yourself!"
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Post 7 made on Saturday April 17, 2010 at 12:42
ErikS
Active Member
Joined:
Posts:		July 2003
699
On April 15, 2010 at 21:24, Avid67 said...
Scheduling can be done through the XP-8. Set up an event on the processor and call up a macro for settings.

Sorry, I should have clarified better. You can do schedules, but not that the end user can change on the fly without a lot of installer programming and a ton of flags.
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Post 8 made on Saturday April 17, 2010 at 14:00
vbova27
Super Member
Joined:
Posts:		July 2006
2,987
I have gotten around this by getting to know the customers situation and giving him some presets he can schedule that will fit in with his lifestyle. You should make more than you need and keep them out there in case the customer wants to change it up later.
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Post 9 made on Saturday April 17, 2010 at 23:31
Benford AV
Active Member
Joined:
Posts:		August 2007
714
Just buy the Aprilaire "starter pack" and then add as many Tstats as you want.

The kit includes everything you need to do 2-way.
The Soundwave
www.the-soundwave.com
B&W, Classe', Rotel, Paradigm, Integra, Denon, Audioquest, RTI, Niles, Pioneer Elite, Bell'O
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