Raypak Hi Delta 502C
The Raypak Hi Delta 502C is a non-condensing copper finned-tube commercial hydronic boiler rated 500 MBTUH input and 420 MBTUH Type H output at 84% thermal efficiency, with 2-stage (H3) firing and a 6 in flue collar.
Key figures
- Max input
- 500 MBH
- Max CSA output
- 420 MBH
- AFUE
- —
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Raypak Hi Delta 502C in practice
The 502C is the 500 MBTUH size of Raypak's Hi Delta non-condensing copper finned-tube hydronic line with cast-iron headers. The official ratings tables print 500 MBTUH input and 420 MBTUH Type H output at 84% thermal efficiency, with 2-stage (H3) firing, a 50 in casing width, a 1-1/4" NPT gas connection, a 6 in flue collar, 6 A boiler amp draw and 545 lb approximate shipping weight.
Hi Delta models are documented by I&O manuals 241663 (302C-902C) and 241664 (992C-2342C), with submittals 241877 and 241879 carrying the rating and flow tables. The line is available for indoor or outdoor installation and vents as Category I or III equipment; natural gas and propane are both listed.
Best suited to
- Commercial hydronic loads near 500 MBTUH input
- Retrofit plants replacing an existing Hi Delta or other atmospheric copper-fin boiler
- Buildings with Category I or III venting where condensing operation is not required
Applicability and support
- Model number
- 502C
- Canadian availability
- unknown
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Raypak. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input | 500 MBH | Rated input 500 MBTUH printed in the Hi Delta submittals (241877/241879) and the 1100.15 commercial catalogue. |
| Output | ||
| Output | 420 MBH | Type H (hydronic) output 420 MBTUH at 84% thermal efficiency per the 1100.15 catalogue ratings table. |
| Efficiency | ||
| AHRI thermal efficiency | 84 % | 84% thermal efficiency for Type H models per the 1100.15 catalogue ratings table. |
| Venting and air | ||
| Venting category | Category I & III | Non-condensing Category I or III venting per the Hi Delta product page. |
| Flue outlet | 6 in | Flue collar diameter (K) per the Hi Delta submittals. |
| Physical and connections | ||
| Width (A) | 50 in | Dimension A printed in the Hi Delta submittals. |
| Gas connection | 1-1/4" NPT | Gas connection (natural gas) per the Hi Delta submittals; the submittals print propane connection sizes separately. |
| Weight | 545 lb | Approximate shipping weight 545 lb printed in the Hi Delta submittals. |
| Electrical | ||
| Electrical | 120 VAC, 1-phase | Operating voltage from the Hi Delta product page model rows. |
| Operating limits and other | ||
| Firing stages | 2-stage (H3) | Firing stages printed in the Hi Delta submittals: H3 2-stage (302C-902C), H8 3-stage (992C), H9 4-stage (1262C-2342C). |
| Maximum water flow | 90 GPM | Maximum water flow from the Hi Delta product page model rows. |
| Fuel | Natural gas or propane | Natural gas or propane; the submittals print natural-gas and propane connection sizes. |
Manuals
Alerts documented for this model
None documented yet.
Frequently asked questions
What are the Hi Delta 502C ratings?
The official tables print 500 MBTUH input, 420 MBTUH Type H output at 84% thermal efficiency, with 2-stage (H3) firing.
Is the Hi Delta 502C condensing?
No. The Hi Delta is Raypak's non-condensing copper finned-tube line with cast-iron headers, vented as Category I or III; the condensing members of the catalogue are the XVers, XTherm, XFIIRE and MVB Category IV lines.
Can the 502C run on propane?
Yes — the Hi Delta submittals print natural-gas and propane connection sizes and rates for this size.
Questions about the Raypak Hi Delta 502C?
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
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Sources and verification
- Raypak — official site · accessed September 9, 2026
- Raypak — Hi Delta hydronic boiler product page · accessed September 9, 2026
- Raypak — Hi Delta Type H Models 302C-902C product submittal (241877) · accessed September 9, 2026
- Raypak — Hi Delta Type H Models 992C-2342C product submittal (241879) · accessed September 9, 2026
- Raypak — Commercial Product Catalog 1100.15 (Hi Delta models 302C-2342C ratings) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.