Where can I find this?

[kwaichang]

Anyone know where I can find an actuator for the low ambient dampers on an old Trane CGAE-C40. The Robert Shaw model number is P020-2202?

Here is a link to a cut sheet.

http://www.icca.invensys.com/UNILINE/d/d109.pdf

I got it from a google search, but I haven't found a place to order one.

The Robert Shaw number crosses to a Uni-Line order number 3520-022

[SteveBelcher]

Anyone know where I can find an actuator for the low ambient dampers on an old Trane CGAE-C40. The Robert Shaw model number is P020-2202?

Here is a link to a cut sheet.

http://www.icca.invensys.com/UNILINE/d/d109.pdf

I got it from a google search, but I haven't found a place to order one.

The Robert Shaw number crosses to a Uni-Line order number 3520-022

Have you considered a vsd on the fan or a fan cycling switch those dampers are bad to leak refrigerant out of the bellows.

[cperk]

Trane recommends changing it to an electric actuator. You have to add a sat. cond. temp. sensor and the module I think. I believe it's pretty expensive though. I found a similar actuator but the stroke was like an inch shorter, if I remember correctly, but I made it work. I don't think you can find that actuator any more.

[chillrdude]

there is one on ebay for about 350.00

[Octopus]

Why oh why not go with vfd

[kwaichang]

Trane recommends changing it to an electric actuator. You have to add a sat. cond. temp. sensor and the module I think. I believe it's pretty expensive though.

The Trane Parts Center quoted me @ $4000 for the parts to retrofit. The parts included KIT03939 and KIT03942. They say that everything I would need is in these kits.

Add markup and labor and you are probably talking about a $10,000 retrofit.

The chiller is a 1995 model, and is about worn out. If I was the customer I would not put that kind of money into it.

[kwaichang]

Have you considered a vsd on the fan

Can you reccomend one that does not require a motor change and works off of head pressure?

[cperk]

Jack the dampers open and put a Penn press. switch on that fan.

[kwaichang]

Jack the dampers open and put a Penn press. switch on that fan.

That's how it is now. I get LPC trips when it's really cold. The "on/off" control of the fan seems like it's causing me problems. It seems like the TXV can't respond fast enough to the rapid changes in head pressure and my low pressure takes a nose dive when the fan cycles on.

LWT setpoint is 40 degF.

[cperk]

That's how it is now. I get LPC trips when it's really cold. The "on/off" control of the fan seems like it's causing me problems. It seems like the TXV can't respond fast enough to the rapid changes in head pressure and my low pressure takes a nose dive when the fan cycles on.

LWT setpoint is 40 degF.

What is your pressure settings on the Penn? Cut in and cut out.

[BKS60]

Since you said it has a TXV you might consider installing a Johnson Controls A350 and a 24v/0-10 actuator on the existing dampers. Strap the sensor that comes with the controller on the liquid line and set the controller to your desired liquid temp.

I think the price would be reasonable and you have power for the controller readily availible. You would have to make a weathersheild for the actuator.

[Dallas Duster]

Can you reccomend one that does not require a motor change and works off of head pressure?

What kind of motors are on there now ? Figured that it was 3 phase. Call the manufacturer and find out.

[Dallas Duster]

Why oh why not go with vfd

WWJD I like that idea a lot!!!!!