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Type: Posts; User: deme

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1. Thread: Heat Pump Defrost at 40 degrees?

by deme
Replies
17
Views
1,417

On my Carrier heat pump, defrost is a function of...

On my Carrier heat pump, defrost is a function of time and outside coil defrost thermostat.
The thermostat is set to close its contacts at 30*F (to initiate a defrost cycle at the appropriate...

by deme
Replies
15
Views
2,398

Right On.
3. Thread: buzzing sound, maybe transformer?

by deme
Replies
15
Views
2,398

I had two 'buzzing' problems. The first one was...

The first one was a loud one occasionally coming out of the heat pump condenser. Opened the beast up and traced the noise to the reversing valve coil. Put my finger on...

by deme
Replies
16
Views
1,974

Larry, I got my curves from the Carrier Product...

Larry,
I got my curves from the Carrier Product data booklet for the Carrier 38YXA heat pumps. Mine is a 2 ton unit and the following curves give information for 2, 2.5, 3, 3.5, 4 and 5 ton heat...

by deme
Replies
16
Views
1,974

There are several ways to determine the setting...

There are several ways to determine the setting of the balance point. Here is how I did mine:

I used the heatpump output curves to determine output for 30*F, 35*F and 40*F outdoor temperatures...
6. Thread: Furnace running off generator

by deme
Replies
7
Views
1,079

I run my Lennox G60DFV furnace off a Generac...

I run my Lennox G60DFV furnace off a Generac XL4000 4,000 watt generator during infrequent power outages.

I have an approved single circuit manual transfer switch connected to the house electric...

by deme
Replies
16
Views
1,974

I'm not a pro but the calculation is...

I'm not a pro but the calculation is straightforward.
All types of energy can be converted from one form to another.
In this calculation I'll express electric energy in terms of THERMS.

from:...
8. Thread: Using Central A/C for heating & dehumdification

by deme
Replies
3
Views
500

The following paper deals with dehumidification...

The following paper deals with dehumidification when neither heating nor cooling are required.

http://www.buildingscience.com/resources/mechanical/hvac/conditioning_air.pdf

by deme
Replies
35
Views
5,297

The installation instruction book for my Carrier...

The installation instruction book for my Carrier 38YXA heat pump describes the thermostat which (along with the timer) initiates a defrost cycle.

This thermostat closes its contacts to enable a...
10. Thread: Gas BTUs, units and power conversions?

by deme
Replies
3
Views
497

I am aware of the high price of electricity in...

I am aware of the high price of electricity in Ontario. You poor people are paying for the sins of several past governments and of Ontario Hydro.

The cost per kwh I mentioned was the total cost...
11. Thread: Gas BTUs, units and power conversions?

by deme
Replies
3
Views
497

I did a calculation on costs for my house some...

I did a calculation on costs for my house some time ago. The arithmetic is pretty detailed but not complicated.
You may have to do some unit conversions because I used Candian information.
Hope it...
12. Thread: Heat Pumps: When Are They a Good Idea? Replacing Furnace and AC in New Jersey

by deme
Replies
41
Views
3,285

What is the cost difference between air...

What is the cost difference between air conditioning only and a heat pump (which also provides air conditioning)?. While all the other advice is relevant, the above cost difference should govern in...

by deme
Replies
8
Views
2,165

Sparking, which generates random radio frequency...

Sparking, which generates random radio frequency waves, at brushes of a commutator motor is not so rare. You don't need a psychiatrist and it's not aliens.
Clean commutator and make sure brushes...

by deme
Replies
35
Views
5,297

I don't know if this applies in your case but...

I don't know if this applies in your case but regardless of the lockout setting, the furnace will operate when the system calls for a defrost.

by deme
Replies
35
Views
5,297

The regular owner's manual doesn't explain the...

The regular owner's manual doesn't explain the lockout setting. You need the following pamphlet:
Programmable Dual Fuel Thermostats. Installation, Start-Up, and Operating Instructions.
You'll find...
16. Thread: HeatPump in Seattle? does it really save \$\$?

by deme
Replies
9
Views
753

1760 sq. ft. rancher in Vancouver B.C. area, just...

1760 sq. ft. rancher in Vancouver B.C. area, just North of Blaine Wa.
Replaced old 19 year old gas furnace in June/03 with 80% efficiency gas furnace.

Installed 2 ton heat pump during summer...
17. Thread: Outside air temp sensors, nice or toy?

by deme
Replies
22
Views
1,819

In my house (dual fuel system), the outdoor...

In my house (dual fuel system), the outdoor temperature sensor cuts out heat pump operation at 35*F and lower. It is necessary for the proper functioning of the equipment.
18. Thread: sizing ac units for home

by deme
Replies
10
Views
2,693

when I was comparing identical houses, I should...

when I was comparing identical houses, I should have said that the windows in the second house faced West.
19. Thread: Dehumidifing a Crawl Space

by deme
Replies
18
Views
1,334

Crawl space walls are poured concrete and are...

Crawl space walls are poured concrete and are insulated with R12 bat insulation.No vapour barrier on walls.

Initially I painted the crawlspace floor with latex concrete paint. Painting did not...
20. Thread: Dehumidifing a Crawl Space

by deme
Replies
18
Views
1,334

I had a similar problem. My crawl space floor is...

My crawl space floor is covered with very rough poor quality concrete. I covered it with a heavy gauge vapour barrier plastic sheets. Musty smell was reduced very...
21. Thread: sizing ac units for home

by deme
Replies
10
Views
2,693

There is no such thing as a rule of thumb. Take...

There is no such thing as a rule of thumb.
Take two identical houses. One has large windows facing North and the other one has the same windows facing South and gets reflections from a lake. If you...
22. Thread: Heat pump set back vs. no set back

by deme
Replies
11
Views
887

I live in white Rock, just outside Vancouver. The...

I live in white Rock, just outside Vancouver. The design temp. for heating for Vancouver is 17*F. My heat pump is a Carrier 38YXA 2 ton unit. with an HSPF of approximately 8.6 and a SEER of up to...
23. Thread: Heat pump set back vs. no set back

by deme
Replies
11
Views
887

Most of the time, the outside temperature is...

Most of the time, the outside temperature is above freezing.
My heat pump is backed up by a natural gas furnace and the balance point is set at 35*F. Below balance point, furnace does all the...
24. Thread: 7* temp split between up and downstairs

by deme
Replies
28
Views
1,745

Originally posted by virginiajersey [B]...

[QUOTE]Originally posted by virginiajersey
[B]

Yes, I added a supply duct and register to the colder room. The room in which we do most of our living, was about 2*F colder than other rooms...
25. Thread: 7* temp split between up and downstairs

by deme
Replies
28
Views
1,745

Keep in mind that I'm a homeowner who likes to...

Keep in mind that I'm a homeowner who likes to keep himself informed and not an HVAC professional . My house is heated and cooled by a 2 ton Carrier Performance Series heat pump using a Carrier dual...
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