New thermostat, does that it need a delay?

[jurob]

Have a 97 Gulfstream with 2 Coleman ducted 13.5k and 50 amp service. Also has 6600 watt generator.

has 2 thermostats and old says, built in time delay and fuse protection.

Replaced 1 with a standard analog Coleman thermostat without delay. Going to install a second one and just realized it has no delay.

Do I need a delay?

[OnaQuest]

dougrainer wrote:

OnaQuest wrote:

dougrainer wrote:

OnaQuest wrote:
You don't need a delay. The Coleman compressors have their own internal short cycle delay. The delay will not allow the compressor to restart for about two minutes when power is lost or shut off. This is to let the pressure bleed off prior to restart.

WRONG. The delay is built into the wall tstat. Doug

You are correct in the OPs case...
However, my system of two ducted Coleman A/Cs uses the Intellitec ECC and there is NO delay in the wall thermostat.
I was incorrect in stating that the A/C compressor contained the delay, when it is actually located in the ECC controller.

Your RV is 18 years old. Lets try to keep advice on at least RV's built in the last 10 years. THAT is what my expert advice is based on and the fact that the OP stated he was buying NEW tstats. AS to your case. IS the EMS Intellitec the one Fleetwood used back then that BOTH AC units were controlled by that ECC system at one wall panel that had a slider control for temp adjustment for each AC? If so, that system was designed just like the older RVP wall tstats. Since the system did not use a RVP built tstat, Intellitec incorporated the delay into their system. Winne and Fleetwood both used that system back then. Doug

I case you can't read, the OP's coach is ALSO 18 years old, and could have the same (or similar) system that I have. Your comment is absurd and insulting (as you no doubt intended).

If you don't know the difference between the Intellitec EMS and the Intellitec ECC, your "expert advice" could be suspect. I won't waste my time explaining them to you, but I can point you to the information.

[dougrainer]

OnaQuest wrote:

dougrainer wrote:

OnaQuest wrote:
You don't need a delay. The Coleman compressors have their own internal short cycle delay. The delay will not allow the compressor to restart for about two minutes when power is lost or shut off. This is to let the pressure bleed off prior to restart.

WRONG. The delay is built into the wall tstat. Doug

You are correct in the OPs case...

However, my system of two ducted Coleman A/Cs uses the Intellitec ECC and there is NO delay in the wall thermostat.

I was incorrect in stating that the A/C compressor contained the delay, when it is actually located in the ECC controller.

Your RV is 18 years old. Lets try to keep advice on at least RV's built in the last 10 years. THAT is what my expert advice is based on and the fact that the OP stated he was buying NEW tstats. AS to your case. IS the EMS Intellitec the one Fleetwood used back then that BOTH AC units were controlled by that ECC system at one wall panel that had a slider control for temp adjustment for each AC? If so, that system was designed just like the older RVP wall tstats. Since the system did not use a RVP built tstat, Intellitec incorporated the delay into their system. Winne and Fleetwood both used that system back then. Doug

[OnaQuest]

dougrainer wrote:

OnaQuest wrote:
You don't need a delay. The Coleman compressors have their own internal short cycle delay. The delay will not allow the compressor to restart for about two minutes when power is lost or shut off. This is to let the pressure bleed off prior to restart.

WRONG. The delay is built into the wall tstat. Doug

You are correct in the OPs case...

However, my system of two ducted Coleman A/Cs uses the Intellitec ECC and there is NO delay in the wall thermostat.

I was incorrect in stating that the A/C compressor contained the delay, when it is actually located in the ECC controller.

[dougrainer]

jurob wrote:
Thanks I will get the thermostat without out the delay.

You do not understand. IF you are buying a RVP tstat, it already has the delay. Doug

[dougrainer]

jbbrick wrote:
Most residential stats have a setting for "heat anticipator" which is needed for home furnaces but is not used for rv's. Your time delay is built in to the heater control panel and there is no time delay in the stat. There may be exceptions to this but I'm not aware of them.

Wrong also, The delay is built into the wall Tstat. Doug

[dougrainer]

OnaQuest wrote:
You don't need a delay. The Coleman compressors have their own internal short cycle delay. The delay will not allow the compressor to restart for about two minutes when power is lost or shut off. This is to let the pressure bleed off prior to restart.

WRONG. The delay is built into the wall tstat. Doug

[OnaQuest]

You don't need a delay. The Coleman compressors have their own internal short cycle delay. The delay will not allow the compressor to restart for about two minutes when power is lost or shut off. This is to let the pressure bleed off prior to restart.

[jurob]

Thanks I will get the thermostat without out the delay.

[jbbrick]

Most residential stats have a setting for "heat anticipator" which is needed for home furnaces but is not used for rv's. Your time delay is built in to the heater control panel and there is no time delay in the stat. There may be exceptions to this but I'm not aware of them.

[dougrainer]

ALL current RVP wall tstats have a compressor time delay. Post the P/N of the Tstat you purchased. But, NO, you do not have to have the delay. The delay is just a convienance factor for RV'ers that would attempt a quick restart without allowing the compressor head pressure to equalize. Doug

[Golden_HVAC]

"Standard analog" - I hope that does not mean it 'must be level' to be calibrated. This can swing on and off while driving, that would be REALLY bad. . If it is magnetic (you can hear it click on and off) then that is acceptable, but the old mercury filled thermostat will not work right while the RV is moving.

Anything that is electronic should work well. It might run on batteries, that might need to be replaced once a year. Leaving it in the 'off' position while in storage might prolong the battery life to 3 years. .

Many electronic thermostats will have a built in time delay.

The time delay is required to prevent the compressor from shutting off, then being turned back on within 3 minutes. This 'short cycle' can damage the compressor windings. If you can 'remember' to not shut off the compressor, then turn it right back on, the thermostat without the built in time delay will work great. . .

Good luck,

Fred.